fix bug in publications.yaml

Author: dyuliu

_data/publications.yaml

@@ -7,7 +7,7 @@
   image: /images/publications/sintel.png
   links: 
     - name: "pdf"
-      url: "https://arxiv.org/pdf/2204.09108.pdf",
+      url: "https://arxiv.org/pdf/2204.09108.pdf"
     - name: "bib"
       url: "#"
     - name: "code"