fix(CI): sql import

SQL import failed to push due to github branch protection.
Seems this will allow the actual supplied token to be used which has push access.
The solution was found from https://github.community/t5/GitHub-Actions/Push-to-restricted-master-branch/m-p/54948

.github/workflows/import_pending_sql.yml

@@ -11,6 +11,8 @@ jobs:
     runs-on: ubuntu-18.04
     steps:
       - uses: actions/checkout@v2
+        with:
+          persist-credentials: false
       - name: Extract branch name
         run: echo "##[set-output name=branch;]$(echo ${GITHUB_REF#refs/heads/})"
         id: extract_branch