Update semgrep.yml

Author: iondrimba

.github/workflows/semgrep.yml

@@ -21,6 +21,9 @@ jobs:
   semgrep:
     name: semgrep-oss/scan
     runs-on: ubuntu-latest
+    container:
+      # A Docker image with Semgrep installed. Do not change this.
+      image: semgrep/semgrep
     if: (github.actor != 'dependabot[bot]')
     steps:
       - uses: actions/checkout@v4