Add SKIP environment variable to pre-commit step in lint workflow

Author: iMicknl

.github/workflows/lint.yaml

@@ -30,4 +30,6 @@ jobs:
         run: uv sync --all-extras --dev
 
       - name: Run pre-commit
+        env:
+          SKIP: ${{ github.ref == 'refs/heads/main' && 'no-commit-to-branch' || '' }}
         run: uv run pre-commit run --show-diff-on-failure --color=always --all-files