Add permissions to test workflow

Author: connor-baer

.github/workflows/ci.yaml

@@ -2,13 +2,16 @@ name: Continuous Integration
 
 on: [push]
 
+permissions:
+  contents: write
+
 jobs:
   build:
     name: Build
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Use Node.js v24
         uses: actions/setup-node@v6