fix: correct heredoc syntax in release workflow

Use proper syntax for passing arguments to Python via heredoc

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: AndersonBY

.github/workflows/release.yml

@@ -53,7 +53,7 @@ jobs:
         # Try to extract changelog from CHANGELOG.md first
         if [ -f "CHANGELOG.md" ]; then
           # Look for the version section in CHANGELOG.md
-          python3 << 'EOF' "$VERSION" > release_notes.md
+          python3 - "$VERSION" << 'EOF' > release_notes.md
 import re
 import sys