CI: add least-privilege permissions to GitHub Actions workflows

.github/workflows/browser.yml

@@ -6,6 +6,10 @@ on:
       - 'main'
   pull_request:
 
+permissions:
+  contents: read
+  pull-requests: read
+
 jobs:
   browser:
     runs-on: ubuntu-latest

.github/workflows/cloud.yml

@@ -6,6 +6,10 @@ on:
       - 'main'
   pull_request:
 
+permissions:
+  contents: read
+  pull-requests: read
+
 jobs:
   qa:
     runs-on: ubuntu-latest

.github/workflows/initiate_release.yml

@@ -7,6 +7,10 @@ on:
         description: "The new version number with 'v' prefix. Example: v1.40.1"
         required: true
 
+permissions:
+  contents: write
+  pull-requests: write
+
 jobs:
   init_release:
     name: 🚀 Create release PR

.github/workflows/integration.yml

@@ -6,6 +6,10 @@ on:
       - 'main'
   pull_request:
 
+permissions:
+  contents: read
+  pull-requests: read
+
 jobs:
   integration:
     runs-on: ubuntu-latest

.github/workflows/lint.yml

@@ -6,6 +6,10 @@ on:
       - 'main'
   pull_request:
 
+permissions:
+  contents: read
+  pull-requests: read
+
 jobs:
   lint:
     runs-on: ubuntu-latest

.github/workflows/size.yml

@@ -8,6 +8,10 @@ on:
       - 'test/**'
       - '**.md'
 
+permissions:
+  contents: read
+  pull-requests: read
+
 jobs:
   build:
     runs-on: ubuntu-latest

.github/workflows/type.yml

@@ -6,6 +6,10 @@ on:
       - 'main'
   pull_request:
 
+permissions:
+  contents: read
+  pull-requests: read
+
 jobs:
   types:
     runs-on: ubuntu-latest