docs(multiple charts): fix asides (#21073)

**Description**
Fixes asides and restores nextcloud migration guide images.

⚒️ Fixes  # 

**⚙️ 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?**

**📃 Notes:**

**✔️ 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
- [X] 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`

---

_Please don't blindly check all the boxes. Read them and only check
those that apply.
Those checkboxes are there for the reviewer to see what is this all
about and
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.github/SUPPORT.md

@@ -43,7 +43,7 @@ Support for Talos-OS with either Rancher or FluxCD are in early alpha.
 | --------------- | -------- | ---------------------- | ------------------------- | --------------------- | ----- |
 | v2.7.9 or prior | `master` | :white_check_mark:     | :x:                       | :x:                   |       |
 
-:::warning Support Guidelines
+:::caution[Support Guidelines]
 
 Our [Discord](https://discord.gg/tVsPTHWTtr) support (the ticketing system inside #support) is primarily limited to what is covered by our written guides. This includes installing, linking and editing apps. This doesn't mean the actual setup of the application. All #support tickets covered by the staff are done so in a **best effort** policy.