chore(deps): update actions/upload-artifact digest to b4b15b8 (#1011)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
|
[actions/upload-artifact](https://redirect.github.com/actions/upload-artifact)
| action | digest | `5076954` -> `b4b15b8` |

---

> [!WARNING]
> Some dependencies could not be looked up. Check the Dependency
Dashboard for more information.

---

### 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

---

This PR was generated by [Mend Renovate](https://mend.io/renovate/).
View the [repository job
log](https://developer.mend.io/github/pachli/pachli-android).

<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzOC4xMjAuMSIsInVwZGF0ZWRJblZlciI6IjM4LjEyMC4xIiwidGFyZ2V0QnJhbmNoIjoibWFpbiIsImxhYmVscyI6W119-->

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

.github/workflows/apk-on-comment.yml

@@ -53,7 +53,7 @@ jobs:
 
       - name: Upload APK Release Asset
         id: upload-release-asset-apk
-        uses: actions/upload-artifact@50769540e7f4bd5e21e526ee35c689e35e0d6874 # v4
+        uses: actions/upload-artifact@b4b15b8c7c6ac21ea08fcf65892d2ee8f75cf882 # v4
         with:
           name: app-release.apk
           path: ${{steps.sign_app_apk.outputs.signedReleaseFile}}

.github/workflows/upload-blue-release-google-play.yml

@@ -47,7 +47,7 @@ jobs:
 
       - name: Upload APK Release Asset
         id: upload-release-asset-apk
-        uses: actions/upload-artifact@50769540e7f4bd5e21e526ee35c689e35e0d6874 # v4
+        uses: actions/upload-artifact@b4b15b8c7c6ac21ea08fcf65892d2ee8f75cf882 # v4
         with:
           name: app-release.apk
           path: ${{steps.sign_app_apk.outputs.signedReleaseFile}}

.github/workflows/upload-orange-release-google-play.yml

@@ -52,7 +52,7 @@ jobs:
 
       - name: Upload APK Release Asset
         id: upload-release-asset-apk
-        uses: actions/upload-artifact@50769540e7f4bd5e21e526ee35c689e35e0d6874 # v4
+        uses: actions/upload-artifact@b4b15b8c7c6ac21ea08fcf65892d2ee8f75cf882 # v4
         with:
           name: app-release.apk
           path: ${{steps.sign_app_apk.outputs.signedReleaseFile}}