Revert "Bump @oddbird/popover-polyfill from 0.5.2 to 0.6.0" (#3511)

Author: jonrohan

package-lock.json

@@ -53,7 +53,7 @@
     "@github/relative-time-element": "^4.0.0",
     "@github/remote-input-element": "^0.4.0",
     "@github/tab-container-element": "^3.1.2",
-    "@oddbird/popover-polyfill": "^0.6.0",
+    "@oddbird/popover-polyfill": "^0.5.2",
     "@primer/behaviors": "^1.3.4",
     "@primer/live-region-element": "^0.8.0"
   },