Add HTTP request to deploy CI script to update Download page automatically

Author: limzykenneth

.github/workflows/deploy.yaml

@@ -23,3 +23,5 @@ jobs:
         branch: gh-pages # The branch the action should deploy to.
         folder: dist/ # The folder the action should deploy.
         single-commit: false # "false" here means "preserve git history on the gh-pages branch"
+    - name: Update Download page
+      run: curl https://p5js.org/download/release.php