fix(invidious): patch hmac_key requirement (#10310)

**Description**
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Upstream made the hmac_key mandatory. This PR makes that question
required with explanation a random key is required along with changes to
ensure the chart passes CI. Default value not provided to ensure users
provide a unique value.

⚒️ Fixes  #10309 

**⚙️ Type of change**

- [ ] ⚙️ Feature/App addition
- [X] 🪛 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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CI passes on forked branch.

**📃 Notes:**
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**✔️ Checklist:**

- [X] ⚖️ My code follows the style guidelines of this project
- [X] 👀 I have performed a self-review of my own code
- [X] #️⃣ I have commented my code, particularly in hard-to-understand
areas
- [ ] 📄 I have made corresponding changes to the documentation
- [X] ⚠️ 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

**➕ App addition**

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

- [ ] 🪞 I have opened a PR on
[truecharts/containers](https://github.com/truecharts/containers) adding
the container to TrueCharts mirror repo.
- [ ] 🖼️ I have added an icon in the Chart's root directory called
`icon.png`

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charts/stable/invidious/Chart.yaml

@@ -21,7 +21,7 @@ sources:
   - https://github.com/truecharts/charts/tree/master/charts/stable/invidious
   - https://github.com/iv-org/invidious
   - https://docs.invidious.io/installation/#docker
-version: 5.0.11
+version: 5.1.0
 annotations:
   truecharts.org/catagories: |
     - media

charts/stable/invidious/ci/test-values.yaml

@@ -0,0 +1,3 @@
+invidious:
+  miscellaneous:
+    hmac_key: "change_me"

charts/stable/invidious/questions.yaml

@@ -342,7 +342,7 @@ questions:
                   default: false
               - variable: hmac_key
                 label: HMAC Key
-                description: HMAC signing key used for CSRF tokens and pubsub subscriptions verification.
+                description: HMAC signing key used for CSRF tokens and pubsub subscriptions verification. A random key must be generated and placed here.
                 schema:
                   type: string
                   private: true