[chore] Fix GH label generation script (#1455)

.github/workflows/generate-registry-area-labels.yml

@@ -5,7 +5,7 @@ on:
     paths:
       - model/**
       - ./.github/workflows/generate-registry-area-labels.yml
-      - ./.github/workflows/scripts/generate-registry-area-labels.sh
+      - ./internal/tools/scripts/generate-registry-area-labels.sh
 
   workflow_dispatch:
 
@@ -15,14 +15,11 @@ jobs:
     if: ${{ github.repository_owner == 'open-telemetry' }}
     steps:
       - uses: actions/checkout@v4
+
+      # areas.txt is generated by the Make target generate-gh-issue-templates
       - name: Generate registry area labels
         run: |
           make generate-gh-issue-templates
-
-      - name: Run update permissions
-        run: chmod +x ./.github/workflows/scripts/generate-registry-area-labels.sh
-
-      - name: Generate registry area labels
-        run: ./.github/workflows/scripts/generate-registry-area-labels.sh
+          ./internal/tools/scripts/generate-registry-area-labels.sh ./internal/tools/bin/areas.txt
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}