chore(deps): update actions/upload-artifact action to v6 (#691)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
|
[actions/upload-artifact](https://redirect.github.com/actions/upload-artifact)
| action | major | `v5` -> `v6` |

---

### Release Notes

<details>
<summary>actions/upload-artifact (actions/upload-artifact)</summary>

###
[`v6`](https://redirect.github.com/actions/upload-artifact/compare/v5...v6)

[Compare
Source](https://redirect.github.com/actions/upload-artifact/compare/v5...v6)

</details>

---

### Configuration

📅 **Schedule**: Branch creation - At any time (no schedule defined),
Automerge - At any time (no schedule defined).

🚦 **Automerge**: Disabled by config. Please merge this manually once you
are satisfied.

♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the
rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about this update
again.

---

- [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check
this box

---

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.github/workflows/android_beta_build.yml

@@ -45,7 +45,7 @@ jobs:
         run: ./gradlew :app:assembleBeta
 
       - name: Upload APK
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         with:
           path: ./android/app/build/outputs/apk/beta/app-beta.apk
           name: hackernews-beta-${{github.sha}}.apk

.github/workflows/android_release_build.yml

@@ -60,7 +60,7 @@ jobs:
           unzip ${{ runner.temp }}/app-release.apks -d ${{ runner.temp }}/apks
 
       - name: Upload .apk
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         with:
           path: ${{ runner.temp }}/apks/universal.apk
           name: hackernews-universal-${{github.sha}}.apk