Limit permissions of govulncheck workflow

.github/workflows/govulncheck.yml

@@ -5,6 +5,9 @@ on:
 jobs:
   govulncheck:
     runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      security-events: write
     steps:
       - name: Check out code
         uses: actions/checkout@v4

.github/workflows/lint.yml

@@ -16,10 +16,8 @@ on:
       - go.sum
       - ".github/licenses.tmpl"
       - "script/licenses*"
-
 permissions:
   contents: read
-
 jobs:
   lint:
     runs-on: ubuntu-latest