Add a broader permissions.content: read

Author: compulim

.github/workflows/pull-request-validation.yml

@@ -24,6 +24,9 @@ env:
   NODE_ENV: test # Add instrumentation code
   node-version: 18.20 # Need to bump jest@29 to resolve something in https://github.com/facebook/react-native/issues/35701
 
+permissions:
+  contents: read
+
 jobs:
   build:
     name: Build