Fix warning[excessive-permissions]: overly broad permissions

Author: hugovk

.github/workflows/ci.yml

@@ -7,6 +7,8 @@ on:
   pull_request:
     branches: [main]
 
+permissions: {}
+
 jobs:
   build_dev_container:
     name: Build and test (Dev container)

.github/workflows/release.yml

@@ -15,6 +15,8 @@ on:
 
 run-name: "Release: ${{ inputs.container }}${{ inputs.container == 'devcontainer' && ' + wasicontainer' || '' }}"
 
+permissions: {}
+
 jobs:
   authorize:
     runs-on: ubuntu-latest