fix(publish): write git-checks=false to .npmrc instead of env

'npm config set git-checks false' is rejected (npm strict-validates on
write). env npm_config_git_checks is uncertain (npm may read it too).
Writing git-checks=false directly to .npmrc: pnpm reads it for sure
(official setting), npm publish only warns on the unknown key but does
not abort (read is lenient unlike config set).

Author: TtTRz

.github/workflows/publish.yml

@@ -252,7 +252,7 @@ jobs:
       - name: Publish
         env:
           GITHUB_TOKEN: ${{ github.token }}
-          npm_config_git_checks: 'false'
         run: |
           npm config set provenance true
+          echo "git-checks=false" >> .npmrc
           npm publish --access public