Reduce GitHub Action permissions (#1827)

See:
 * https://docs.zizmor.sh/audits/#excessive-permissions
 * https://docs.zizmor.sh/audits/#artipacked

Author: mpkorstanje

.github/workflows/release-github.yaml

@@ -1,5 +1,7 @@
 name: Release GitHub
 
+permissions: {}
+
 on:
   push:
     branches: [release/*]

.github/workflows/release-ruby.yaml

@@ -1,5 +1,7 @@
 name: Release RubyGems
 
+permissions: {}
+
 on:
   push:
     branches:

.github/workflows/rubocop.yaml

@@ -1,5 +1,7 @@
 name: Lint
 
+permissions: {}
+
 on:
   push:
     branches:
@@ -13,6 +15,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
       - uses: ruby/setup-ruby@6ca151fd1bfcfd6fe0c4eb6837eb0584d0134a0c # v1.290.0
         with:
           ruby-version: '3.4.7'

.github/workflows/test.yaml

@@ -1,5 +1,7 @@
 name: Test cucumber
 
+permissions: {}
+
 on:
   push:
     branches: