ci: add minimum GitHub token permissions for workflows (#6236)

Signed-off-by: Ashish Kurmi <akurmi@stepsecurity.io>

.github/workflows/codeql-analysis.yml

@@ -14,8 +14,15 @@ on:
   schedule:
     - cron: '0 23 * * 0'
 
+permissions:
+  contents: read
+
 jobs:
   analyze:
+    permissions:
+      actions: read  # for github/codeql-action/init to get workflow details
+      contents: read  # for actions/checkout to fetch code
+      security-events: write  # for github/codeql-action/autobuild to send a status report
     name: Analyze
     runs-on: ubuntu-latest
 

.github/workflows/lint.yml

@@ -4,6 +4,9 @@ on:
   push:
   pull_request:
 
+permissions:
+  contents: read
+
 jobs:
   lint:
     runs-on: ubuntu-20.04

.github/workflows/run-tests.yml

@@ -2,6 +2,9 @@ name: Tests
 
 on: [push, pull_request]
 
+permissions:
+  contents: read
+
 jobs:
   build:
     runs-on: ${{ matrix.os }}