use an amend commit instead of an additional commit

.github/workflows/npm-publish.yml

@@ -19,6 +19,9 @@ jobs:
 
     steps:
     - uses: actions/checkout@v4
+      with:
+        # Fetch the last 2 commits instead of just 1. (Fetching just 1 commit would overwrite the whole history)
+        fetch-depth: 2
     - name: Use Node.js (22.x)
       uses: actions/setup-node@v4
       with:
@@ -27,10 +30,20 @@ jobs:
         cache: 'npm'
     - run: npm ci
     - run: npm run bump
+    - name: Get last commit message
+      id: last-commit
+      run: |
+        echo "message=$(git log -1 --pretty=%s)" >> $GITHUB_OUTPUT
+        echo "author=$(git log -1 --pretty=\"%an <%ae>\")" >> $GITHUB_OUTPUT
     # Commit changes to package.json back to the repository
     - uses: stefanzweifel/git-auto-commit-action@v5
       with:
+        commit_author: ${{ steps.last-commit.outputs.author }}
         file_pattern: 'package.json'
+      commit_message: ${{ steps.last-commit.outputs.message }}
+      commit_options: '--amend --no-edit'
+      push_options: '--force'
+      skip_fetch: true
     - run: npm publish --access public --loglevel verbose --dry-run
       env:
         NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}