Add permissions to GitHub Actions workflows

Author: the-mikedavis

.github/workflows/ci.yml

@@ -1,7 +1,7 @@
 name: CI
-
 on: [push, pull_request]
-
+permissions:
+  contents: read
 jobs:
   test:
     name: Test

.github/workflows/generate-parser.yml

@@ -1,11 +1,11 @@
 # generates the parser with 'tree-sitter generate' if the parser is out of date
 name: Generate Parser
-
 on:
   push:
     branches:
       - main
-
+permissions:
+  contents: write
 jobs:
   generate:
     name: Generate Parser