Factor out clone step, GH token from new pick request workflow (#1248)

Author: huntie

.github/workflows/respond-on-new-pick-request.yml

@@ -4,24 +4,27 @@ on:
   issues:
     types: [labeled]
 
+permissions:
+  issues: write
+
 jobs:
   publish-message:
     runs-on: ubuntu-latest
     steps:
-      - name: Checkout the repo
-        uses: actions/checkout@v4
       - name: Publish Message
         uses: actions/github-script@v7
         if: github.event.label.name == 'Type Pick Request'
         with:
-          github-token: ${{ secrets.REACT_NATIVE_BOT_REACT_WG_REACT_NATIVE_RELEASES_TOKEN }}
           script: |
-            const fs = require("fs");
-            const path = require("path");
-            const message = fs.readFileSync(path.resolve(process.env.GITHUB_WORKSPACE, '.github/workflows/pick-request-hello-message.md'), 'utf8');
-            github.rest.issues.createComment({
+            const { data } = await github.rest.repos.getContent({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              path: '.github/workflows/templates/pick-request-hello-message.md',
+            });
+            const message = Buffer.from(data.content, 'base64').toString('utf8');
+            await github.rest.issues.createComment({
               issue_number: context.issue.number,
               owner: context.repo.owner,
               repo: context.repo.repo,
               body: message
-            })
+            });