Fix release workflow bash parsing for package metadata

[benvinegar]

The release workflow failed at:

Run echo "name=$(node -p \"require('./pi/package.json').name\")" >> "$GITHUB_OUTPUT"
...syntax error near unexpected token '('

This updates the metadata step to avoid nested escaped quotes inside command substitution:

• read name/version into shell variables
• append those variables to $GITHUB_OUTPUT

This resolves the bash parse error on GitHub Actions runners.