Add frontmatters to charts except "stable" (#20720)

**Description**
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Please include a summary of the change and which issue is fixed. Please
also include relevant motivation and context. List any dependencies that
are required for this change.
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⚒️ Fixes  # <!--(issue)-->

**⚙️ Type of change**

- [ ] ⚙️ Feature/App addition
- [ ] 🪛 Bugfix
- [ ] ⚠️ Breaking change (fix or feature that would cause existing
functionality to not work as expected)
- [ ] 🔃 Refactor of current code

**🧪 How Has This Been Tested?**
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Please describe the tests that you ran to verify your changes. Provide
instructions so we can reproduce. Please also list any relevant details
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**📃 Notes:**
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**✔️ Checklist:**

- [ ] ⚖️ My code follows the style guidelines of this project
- [ ] 👀 I have performed a self-review of my own code
- [ ] #️⃣ I have commented my code, particularly in hard-to-understand
areas
- [ ] 📄 I have made corresponding changes to the documentation
- [ ] ⚠️ My changes generate no new warnings
- [ ] 🧪 I have added tests to this description that prove my fix is
effective or that my feature works
- [ ] ⬆️ I increased versions for any altered app according to semantic
versioning
- [ ] I made sure the title starts with `feat(chart-name):`,
`fix(chart-name):` or `chore(chart-name):`

**➕ App addition**

If this PR is an app addition please make sure you have done the
following.

- [ ] 🖼️ I have added an icon in the Chart's root directory called
`icon.png`

---

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those that apply.
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charts/incubator/archivebox/CHANGELOG.md

@@ -1 +1,5 @@
+---
+title: Changelog
+---
+
 ## ArchiveBox

charts/incubator/peppermint/CHANGELOG.md

@@ -1 +1,5 @@
+---
+title: Changelog
+---
+
 # Changelog

charts/incubator/slskd/CHANGELOG.md

@@ -1 +1,5 @@
+---
+title: Changelog
+---
+
 ## Slskd

charts/incubator/teslamate/CHANGELOG.md

@@ -0,0 +1,5 @@
+---
+title: Changelog
+---
+
+## Teslamate

charts/incubator/victoriametrics/docs/disclaimer.md

@@ -1,11 +1,11 @@
+---
+title: Disclaimer
+---
+
 # Disclaimer/Warning
 
-VictoriaMetrics is NOT compatible with any TrueCharts Helm Chart and not integrated into the platform
-It's offered as stand-alone chart only, it cannot be connected to any other chart offered by TrueCharts
-We also do not support connecting this with any other charts offered by TrueCharts
+VictoriaMetrics is NOT compatible with any TrueCharts Helm Chart and not integrated into the platform, It's offered as a stand-alone chart only, it cannot be connected to any other chart offered by TrueCharts. We also do not support connecting this with any other charts offered by TrueCharts.
 
-It might, inherently, break other charts offered by TrueCharts, use at your own risk
-No support will be offered anymore for users running any form of Metrics (prometheus or otherwise) with this chart installed.
+It might, inherently, break other charts offered by TrueCharts. Use at your own risk. No support will be offered anymore for users running any form of Metrics (prometheus or otherwise) with this chart installed.
 
-Hence advice heavily against using this with any other TrueCharts chart.
-This chart is also not covered by TrueCharts support
+Hence we advise heavily against using this with any other TrueCharts chart. This chart is also not covered by TrueCharts support.

charts/premium/nextcloud/docs/support.md

@@ -1,3 +1,7 @@
+---
+title: NextCloud Support Policy
+---
+
 # Nextcloud Support Policy
 
 Our support is only covering pre-included Nextcloud apps. We cannot guarantee user-added apps will work or survive updates

charts/premium/traefik/docs/custom-header-middlewares.md

@@ -1,5 +1,5 @@
 ---
-title: Adding or removing headers
+title: Adding or Removing Headers
 ---
 
 The `customRequestHeaders` and `customResponseHeaders` middlewares will allow you to add or remove headers from the request or response.

charts/stable/traefik-forward-auth/docs/how-to.md

@@ -1,6 +1,6 @@
 ---
 title: traefik-forward-auth
-description: A How To Guide for Traefik Forward Auth.
+description: A How To Guide for Traefik Forward Auth
 ---
 
 :::note

charts/system/kubeapps/docs/token.md

@@ -1,5 +1,7 @@
+---
+title: Getting a Login Token for KubeApps
+---
+
 # Getting a Login Token
 
-Currently KubeApps, by default, requires a kubernetes token to login.
-
-To aquire a temporary(!) token, enter the command given in the "notes" section (bottom right corner in SCALE WebUI) and copy the token given to the WebGUI of KubeApps
+Currently KubeApps, by default, requires a kubernetes token to login. To acquire a temporary(!) token, enter the command given in the "notes" section (bottom right corner in SCALE WebUI) and copy the token given to the WebGUI of KubeApps.

charts/system/nvidia-device-plugin/docs/installation.md

@@ -1,3 +1,7 @@
+---
+title: Nvidia Device Plugin Setup
+---
+
 # Talos Linux Setup
 
 ## Enable NVIDIA kernel modules