Update build.yml

Author: LiamConnors

.github/workflows/build.yml

@@ -107,9 +107,10 @@ jobs:
         uses: actions/create-github-app-token@v2
         id: app-token
         with:
-          app-id: ${{ vars.DE_CI_GHAPP_ID }}
-          private-key: ${{ secrets.DE_CI_GHAPP_PRIVATE_KEY }}
+          app-id: ${{ vars.GRAPHING_LIBRARIES_CI_GHAPP_ID }}
+          private-key: ${{ secrets.GRAPHING_LIBRARIES_CI_GHAPP_PRIVATE_KEY }}
           owner: ${{ github.repository_owner }}
+          repositories: documentation
 
       - name: Checkout documentation repo
         if: github.ref_name == 'update-ci' && github.repository == 'plotly/graphing-library-docs'