fixed a typo

Author: Akshay2191

.github/workflows/vulncheck.yml

@@ -25,7 +25,7 @@ jobs:
       security-events: write # for reporting vulnerabilities via code-scanning API
     steps:
       - name: Checkout Repository
-        uses: actions/checkout@checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        uses: actions/@checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with:
             fetch-depth: 0
             ref: ${{ inputs.target-branch || 'main' }}