fix: add chmod +x gradlew in CI workflows

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: typicalsmc

.github/workflows/build.yml

@@ -22,7 +22,7 @@ jobs:
           cache: gradle
 
       - name: Build
-        run: ./gradlew build
+        run: chmod +x gradlew && ./gradlew build
 
       - name: Upload artifact
         uses: actions/upload-artifact@v4

.github/workflows/release-dev.yml

@@ -37,7 +37,7 @@ jobs:
           echo "Dev version: ${VERSION}"
 
       - name: Build
-        run: ./gradlew build -PoverrideVersion=${{ steps.version.outputs.version }}
+        run: chmod +x gradlew && ./gradlew build -PoverrideVersion=${{ steps.version.outputs.version }}
 
       - name: Create pre-release
         uses: softprops/action-gh-release@v2