Update .github/workflows/research-vuln-scan.yml

Co-authored-by: Jaspar Stach <[email protected]>

.github/workflows/research-vuln-scan.yml

@@ -81,7 +81,7 @@ jobs:
     runs-on: "ubuntu-20.04"
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
 
       - name: Build an image from Dockerfile
         run: |