ci: set permissions to workflows (#68)

Author: sapphi-red

.github/workflows/ci.yml

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

.github/workflows/publish.yml

@@ -9,6 +9,9 @@ jobs:
   publish:
     runs-on: ubuntu-latest
     environment: Release
+    permissions:
+      contents: read
+      id-token: write
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-node@v4