add .pdf to the release asset

.github/workflows/release.yml

@@ -52,5 +52,5 @@ jobs:
         with:
           upload_url: ${{ steps.get_release.outputs.upload_url }} # This pulls from the CREATE RELEASE step above, referencing it's ID to get its outputs object, which include a `upload_url`. See this blog post for more info: https://jasonet.co/posts/new-features-of-github-actions/#passing-data-to-future-steps 
           asset_path: shizun_ge_resume.pdf
-          asset_name: shizun_ge_resume
+          asset_name: shizun_ge_resume.pdf
           asset_content_type: application/pdf