upgrade popover-polyfill to latest (#3896)

Author: keithamus

package-lock.json

@@ -99,7 +99,7 @@
     "@github/paste-markdown": "^1.4.0",
     "@github/relative-time-element": "^4.1.2",
     "@lit-labs/react": "^1.1.1",
-    "@oddbird/popover-polyfill": "0.2.3",
+    "@oddbird/popover-polyfill": "^0.3.1",
     "@primer/behaviors": "^1.3.4",
     "@primer/octicons-react": "^19.8.0",
     "@primer/primitives": "^7.11.11",