feat(slink): **BREAKING CHANGE** make slink run rootless (#30794)

**Description**
Makes slink run rootless.

⚒️ Fixes  # 

**⚙️ Type of change**

- [X] ⚙️ Feature/App addition
- [ ] 🪛 Bugfix
- [X] ⚠️ 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
- [X] ⬆️ 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`

---

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charts/stable/slink/Chart.yaml

@@ -35,4 +35,4 @@ sources:
   - https://github.com/truecharts/charts/tree/master/charts/stable/slink
   - https://hub.docker.com/r/anirdev/slink
 type: application
-version: 3.6.0
+version: 4.0.0

charts/stable/slink/values.yaml

@@ -5,8 +5,6 @@ image:
 securityContext:
   container:
     readOnlyRootFilesystem: false
-    runAsGroup: 0
-    runAsUser: 0
 service:
   main:
     ports: