ci: harden GH Actions (#55)

Co-authored-by: StepSecurity Bot <[email protected]>

Author: UlisesGascon

.github/workflows/ci.yml

@@ -17,6 +17,9 @@ concurrency:
   group: "${{ github.workflow }} ✨ ${{ github.event.pull_request.head.label || github.head_ref || github.ref }}"
   cancel-in-progress: true
 
+permissions:
+  contents: read
+
 jobs:
   lint:
     name: Lint

.github/workflows/generate-readme.yml

@@ -9,6 +9,9 @@ on:
       - index.ts
       - config.ts
 
+permissions:
+  contents: read
+
 jobs:
   generate-readme:
     runs-on: ubuntu-latest