Update name of token used to trigger plotnine.org build

Author: has2k1

.github/workflows/build_website.yml

@@ -14,6 +14,6 @@ jobs:
       - name: Build Stable Documentation
         uses: peter-evans/repository-dispatch@v3
         with:
-          token: ${{ secrets.PAT_PLOTNINE_WEBSITE }}
+          token: ${{ secrets.PLOTNINE_WEBSITE }}
           repository: has2k1/plotnine.org
           event-type: push-plotnine-examples-main