fix: use variable assignment instead of heredoc for YAML compatibility

- Replace heredoc with shell variable assignment for release notes
- Avoid YAML parsing issues with complex syntax
- Properly escape backticks for markdown code blocks

Author: claude

.github/workflows/publish-to-releases.yml

@@ -134,9 +134,8 @@ jobs:
 
           echo "Creating release: $RELEASE_TAG"
 
-          # Create release notes file
-          cat > /tmp/release_notes.txt << 'NOTES'
-Pre-compiled gRPC extension for PHP ${PHP_VERSION}
+          # Create release dengan artifacts
+          NOTES="Pre-compiled gRPC extension for PHP ${PHP_VERSION}
 
 gRPC Version: ${GRPC_VERSION}
 PHP Version: ${PHP_VERSION}
@@ -145,24 +144,24 @@ Architectures: AMD64, ARM64
 
 ## Usage in Dockerfile:
 
+\`\`\`dockerfile
 FROM php:${PHP_VERSION}-fpm
 
-RUN curl -L -o /tmp/grpc.so \
-  https://github.com/${{ github.repository }}/releases/download/${RELEASE_TAG}/grpc-amd64.so && \
-  mv /tmp/grpc.so /usr/local/lib/php/extensions/no-debug-non-zts-20220829/grpc.so && \
-  docker-php-ext-enable grpc && \
+RUN curl -L -o /tmp/grpc.so \\
+  https://github.com/${{ github.repository }}/releases/download/${RELEASE_TAG}/grpc-amd64.so && \\
+  mv /tmp/grpc.so /usr/local/lib/php/extensions/no-debug-non-zts-20220829/grpc.so && \\
+  docker-php-ext-enable grpc && \\
   rm -rf /tmp/*
+\`\`\`
 
 ## Available Downloads:
 
 - grpc-amd64.so: https://github.com/${{ github.repository }}/releases/download/${RELEASE_TAG}/grpc-amd64.so
-- grpc-arm64.so: https://github.com/${{ github.repository }}/releases/download/${RELEASE_TAG}/grpc-arm64.so
-NOTES
+- grpc-arm64.so: https://github.com/${{ github.repository }}/releases/download/${RELEASE_TAG}/grpc-arm64.so"
 
-          # Create release dengan artifacts
           gh release create "$RELEASE_TAG" \
             --title "$RELEASE_NAME" \
-            --notes-file /tmp/release_notes.txt \
+            --notes "$NOTES" \
             artifacts/grpc-amd64.so \
             artifacts/grpc-arm64.so