Fix typo

Author: bakpaul

.github/workflows/ci.yml

@@ -230,7 +230,7 @@ jobs:
           "{\"id\":\"$(echo "${{ github.repository }}" | awk -F/ '{ print $2 }')\",\
            \"github_ref\":\"${{ github.sha }}\",\
            \"url\":\"https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }}\",\
-           \"build\":\"\$build_status\",\
+           \"build\":\"$build_status\",\
            \"tests\":\"$test_status\",\
            \"binary\":\"$binary_status\"}"\
            https://sofa-framework.org:5000/api/v1/plugins