Update main.yml

Author: aothms

.github/workflows/main.yml

@@ -5,6 +5,9 @@ jobs:
     runs-on: ubuntu-latest
     name: 'Deploy Nikola to GitHub Pages'
     steps:
+    - name: Mark workspace directory as safe
+      shell: bash
+      run: git config --global --add safe.directory ${GITHUB_WORKSPACE}
     - name: Check out
       uses: actions/checkout@v2
     - name: Build and Deploy Nikola