docs(immich) reduce to warning (#32296)

**Description**

retain Immich warning, clean up extra text

⚒️ 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
- [x] 📜 Documentation Changes

**🧪 How Has This Been Tested?**
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**📃 Notes:**
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**✔️ Checklist:**

- [ ] ⚖️ My code follows the style guidelines of this project
- [x] 👀 I have performed a self-review of my own code
- [ ] #️⃣ I have commented my code, particularly in hard-to-understand
areas
- [ ] 📄 I have made changes to the documentation
- [ ] 🧪 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):`, `chore(chart-name):`, `docs(chart-name):` or
`fix(docs):`

**➕ 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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---------

Signed-off-by: Alfred Göppel <43101280+alfi0812@users.noreply.github.com>
Co-authored-by: Alfred Göppel <43101280+alfi0812@users.noreply.github.com>

charts/stable/immich/docs/install_notes.md

@@ -4,25 +4,9 @@ title: Install Notes
 
 ## Warning
 
-Immich is essentially pre-alpha, it works but its releases are extremely unrelyable while not complying to semver at all.
-This means that Immich might randomly and unexpectedly stop working or loose data.
+Immich is still in a pre-alpha stage - it works, but its releases are highly unreliable and do not adhere to semantic versioning (SemVer). This means that Immich may unexpectedly break or even result in data loss.
 
-That goes for every way you deploy it: There be dragons.
-You're warned. have fun!
+This applies to all deployment methods - proceed with caution.
 
-##
+There be dragons. You've been warned. Have fun!
 
-This chart now requires the following hcarts to be installed before you can install:
-
-- prometheus-operator
-- cloudnative-pg
-
-These are in the system train.
-
-To enable this in TrueNAS scale
-
-- Apps
-- Manage Catalogs.
-- Edit the TrueCharts Catalog (under the three dots).
-- Enable the system train under 'Perferred Trains'.
-- Install the required charts in Available Applications