fix: use github actor for committer

Author: gadenbuie

.github/workflows/build-docs.yml

@@ -53,8 +53,8 @@ jobs:
 
     - name: Commit changes
       run: |
-        git config --global user.name 'github-actions'
-        git config --global user.email 'github-actions@github.com'
+        git config --global user.name "$GITHUB_ACTOR"
+        git config --global user.email "$GITHUB_ACTOR@users.noreply.github.com"
         git add docs/
         git commit -m "ci(docs): Automated site build"
         git push