ci: set CI git user

Author: dominykas

.github/workflows/ci.yaml

@@ -18,6 +18,9 @@ jobs:
 
     steps:
       - uses: actions/checkout@v2
+      - run: |
+          git config user.name github-actions
+          git config user.email github-actions@github.com
       - uses: actions/setup-node@v2
         with:
           node-version: ${{ matrix.node-version }}