fix: Update generate-transcript workflow (#626)

Author: nzakas

.github/workflows/generate-transcript.yml

@@ -5,6 +5,9 @@ on:
 jobs:
   generate-trancript:
     runs-on: ubuntu-latest
+    permissions:
+      contents: write
+      pull-requests: write    
     if: contains(github.event.issue.labels.*.name, 'tsc meeting')
     steps:
       - uses: actions/checkout@v4
@@ -48,5 +51,3 @@ jobs:
              Add ${{ github.event.issue.title }} transcript. 
              
              This PR is autogenerated by the "Generate Transcript" GitHub Action.
-        env:
-          GH_TOKEN: ${{ secrets.GH_TOKEN }}