fixed repo origin condition test in check_license_and_history workflow

.github/workflows/check_license_and_history.yml

@@ -21,7 +21,7 @@ jobs:
         id: changes       
         run: |
           echo ${{github.event.pull_request.head.repo.full_name}}
-          if [ ${{ github.event.pull_request.head.repo.full_name == 'speedb-io/speedb' }} ]; then
+          if [ "${{ github.event.pull_request.head.repo.full_name }}" == "speedb-io/speedb" ]; then
             echo "files added or changed in a PR that came from the speedb repo: "
             git diff --name-only --diff-filter=ACMRT ${{ github.event.pull_request.base.sha }} ${{ github.event.pull_request.head.sha }}  -- . ':!.github' ':!*.md'
             echo "diff_list<<EOF" >> $GITHUB_OUTPUT