chore(deps): update @github/relative-time-element requirement (#5119)

Updates the requirements on [@github/relative-time-element](https://github.com/github/relative-time-element) to permit the latest version.
- [Release notes](https://github.com/github/relative-time-element/releases)
- [Commits](github/relative-time-element@v4.4.2...v4.4.3)

---
updated-dependencies:
- dependency-name: "@github/relative-time-element"
  dependency-type: direct:production
...

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Author: dependabot[bot]

package-lock.json

@@ -78,7 +78,7 @@
     "npm": ">=7"
   },
   "dependencies": {
-    "@github/relative-time-element": "^4.4.2",
+    "@github/relative-time-element": "^4.4.3",
     "@github/tab-container-element": "^4.8.0",
     "@lit-labs/react": "1.2.1",
     "@oddbird/popover-polyfill": "^0.4.4",