fix(release): bump release-it to v19, remove DEBUG workaround

v19 uses {} instead of null for Octokit log option, fixing the
'Cannot read properties of null (reading debug)' crash.
DEBUG/NODE_DEBUG workaround no longer needed.

Author: dutifulbob

.github/workflows/release.yaml

@@ -34,6 +34,4 @@ jobs:
       - run: npm run lint
       - run: npm run release:ci -- --increment ${{ inputs.increment }}
         env:
-          DEBUG: release-it:config
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-          NODE_DEBUG: release-it:config