Fix GHA to not overwrite each other

Author: penelopeysm

.github/workflows/generate_website.yml

@@ -129,3 +129,4 @@ jobs:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           publish_dir: ./web/dist
           destination_dir: ${{ github.event_name == 'pull_request' && 'pr' || '' }}
+          keep_files: true

.github/workflows/refresh_website.yml

@@ -60,4 +60,5 @@ jobs:
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           publish_dir: ./web/dist
-          destination_dir: ''
+          destination_dir: ${{ github.event_name == 'pull_request' && 'pr' || '' }}
+          keep_files: true