ci: set permissions (#78)

Author: sapphi-red

.github/workflows/ci.yml

@@ -6,6 +6,7 @@ on:
   pull_request:
     branches:
       - main
+permissions: {}
 jobs:
   test:
     runs-on: ubuntu-latest

.github/workflows/release-tag.yml

@@ -9,6 +9,8 @@ jobs:
   build:
     name: Create Release
     runs-on: ubuntu-latest
+    permissions:
+      contents: write # for yyx990803/release-tag to create a release tag
     steps:
       - name: Checkout code
         uses: actions/checkout@v5