Updated the CI workflow with the linter to change to the ci branch

Author: mitreac

.github/workflows/ci.yml

@@ -33,6 +33,9 @@ jobs:
       run: |
         git config --local user.email "${actor}@users.noreply.github.com"
         git config --local user.name "$actor"
+    - name: Switch branch
+      run: |
+	git checkout ci
     - name: Test
       run: |
         pytest .