chore: make nightlies artifacts last a month

Author: abdallahmehiz

.github/workflows/nightlies.yml

@@ -58,23 +58,28 @@ jobs:
         with:
           path: ./mpvKt-universal.apk
           name: universal-r${{ env.COMMIT_COUNT }}
+          retention-days: 30
       - name: Upload the arm64-v8a artifact
         uses: actions/upload-artifact@v4
         with:
           path: ./mpvKt-arm64-v8a.apk
           name: arm64-v8a-r${{ env.COMMIT_COUNT }}
+          retention-days: 30
       - name: Upload the armeabi-v7a artifact
         uses: actions/upload-artifact@v4
         with:
           path: ./mpvKt-armeabi-v7a.apk
           name: armeabi-v7a-r${{ env.COMMIT_COUNT }}
+          retention-days: 30
       - name: Upload the x86 artifact
         uses: actions/upload-artifact@v4
         with:
           path: ./mpvKt-x86.apk
           name: x86-r${{ env.COMMIT_COUNT }}
+          retention-days: 30
       - name: Upload the x86_64 artifact
         uses: actions/upload-artifact@v4
         with:
           path: ./mpvKt-x86_64.apk
           name: x86_64-r${{ env.COMMIT_COUNT }}
+          retention-days: 30