Set actions permissions

Author: offa

.github/workflows/ci.yml

@@ -2,6 +2,10 @@ name: ci
 
 on: [push, pull_request]
 
+permissions:
+  contents: read
+  pull-requests: read
+
 jobs:
   build_linux:
     runs-on: ubuntu-latest

.github/workflows/codeql.yml

@@ -6,6 +6,11 @@ on:
   schedule:
     - cron: '0 5 * * 3'
 
+permissions:
+  contents: read
+  pull-requests: read
+  security-events: write
+
 jobs:
   codeql:
     runs-on: ubuntu-latest