fix: security scanner gh token

Author: abhishek-hashicorp

.github/workflows/security-scan.yml

@@ -70,7 +70,7 @@ jobs:
         uses: actions/checkout@0ad4b8fadaa221de15dcec353f45205ec38ea70b # v4.1.4
         with:
           repository: hashicorp/security-scanner
-          token: ${{ secrets.HASHIBOT_PRODSEC_GITHUB_TOKEN }}
+          token: ${{ secrets.PRODSEC_SCANNER_READ_ONLY }}
           path: security-scanner
           ref: main