Fix GitHub Actions YAML syntax in release workflow

Changed double quotes to single quotes in `if` expressions to resolve YAML parsing errors.

Author: google-labs-jules[bot]

.github/workflows/release.yml

@@ -90,7 +90,7 @@ jobs:
           fi
 
       - name: Build Android APK (signed)
-        if: steps.keystore.outputs.has_keystore == "true"
+        if: steps.keystore.outputs.has_keystore == 'true'
         env:
           ALIAS: ${{ secrets.ANDROID_SIGNING_KEY_ALIAS }}
           KEYPASS: ${{ secrets.ANDROID_SIGNING_KEY_PASSWORD }}
@@ -109,7 +109,7 @@ jobs:
             -p:AndroidSigningStorePass="${STOREPASS}"
 
       - name: Build Android APK (unsigned)
-        if: steps.keystore.outputs.has_keystore != "true"
+        if: steps.keystore.outputs.has_keystore != 'true'
         run: |
           dotnet publish -c Release \
             osu.Android/osu.Android.csproj \
@@ -144,7 +144,7 @@ jobs:
           if-no-files-found: error
 
       - name: Create GitHub Release
-        if: startsWith(github.ref, "refs/tags/")
+        if: startsWith(github.ref, 'refs/tags/')
         uses: softprops/action-gh-release@v2
         with:
           files: ${{ steps.find_apk.outputs.apk_path }}