fix(ci): switch to permissionless reusable workflow

Author: hyperpolymath

.github/workflows/secret-scanner.yml

@@ -15,13 +15,5 @@ permissions:
 
 jobs:
   scan:
-    # The reusable's gitleaks job requests pull-requests: write (PR
-    # summary comments) and actions: read. A called workflow cannot
-    # exceed the caller's grant - without these, every run dies at
-    # startup_failure. See standards#472.
-    permissions:
-      contents: read
-      pull-requests: write
-      actions: read
-    uses: hyperpolymath/standards/.github/workflows/secret-scanner-reusable.yml@d135b05bfc647d0c0fbfedc7e80f37ea50f49236
+    uses: hyperpolymath/standards/.github/workflows/secret-scanner-reusable.yml@db12a6ad3ef9076d5f7bdcf98d7d15cf8547555a
     secrets: inherit