Update permissions for security_audit

Author: taiki-e

.github/workflows/ci.yml

@@ -77,6 +77,10 @@ jobs:
       - run: cargo fmt --all --check
 
   security_audit:
+    permissions:
+      checks: write
+      contents: read
+      issues: write
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3