Bump GitHub's relative-time-element to v4.3.0 (#24187)

https://github.com/github/relative-time-element/releases/tag/v4.3.0

I checked and everything still works

Author: yardenshoham

package-lock.json

@@ -13,7 +13,7 @@
     "@citation-js/plugin-software-formats": "0.6.1",
     "@claviska/jquery-minicolors": "2.3.6",
     "@github/markdown-toolbar-element": "2.1.1",
-    "@github/relative-time-element": "4.2.4",
+    "@github/relative-time-element": "4.3.0",
     "@github/text-expander-element": "2.3.0",
     "@mcaptcha/vanilla-glue": "0.1.0-alpha-3",
     "@primer/octicons": "18.3.0",