Update github/codeql-action action to v2.21.5

Author: renovate[bot]

.github/workflows/scan.yml

@@ -39,10 +39,10 @@ jobs:
             **/go.sum
             **/go.mod
       - name: Initialize CodeQL
-        uses: github/codeql-action/init@v2.20.4
+        uses: github/codeql-action/init@v2.21.5
         with:
           languages: go
       - name: Autobuild
-        uses: github/codeql-action/autobuild@v2.20.4
+        uses: github/codeql-action/autobuild@v2.21.5
       - name: Perform CodeQL Analysis
-        uses: github/codeql-action/analyze@v2.20.4
+        uses: github/codeql-action/analyze@v2.21.5