fix(docs): add required permissions for build:docs (#39809)

Author: jamietanna

.github/workflows/build.yml

@@ -635,6 +635,10 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 5
     if: github.event.pull_request.draft != true
+    permissions:
+      contents: read
+      issues: read
+
     steps:
       - name: Checkout code
         uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1