Bump javascript-time-ago from 2.3.8 to 2.3.9

Bumps [javascript-time-ago](https://github.com/catamphetamine/javascript-time-ago) from 2.3.8 to 2.3.9.
- [Release notes](https://github.com/catamphetamine/javascript-time-ago/releases)
- [Changelog](https://github.com/catamphetamine/javascript-time-ago/blob/master/CHANGELOG.md)
- [Commits](https://github.com/catamphetamine/javascript-time-ago/compare/v2.3.8...v2.3.9)

---
updated-dependencies:
- dependency-name: javascript-time-ago
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -16,7 +16,7 @@
         "css-loader": "^6.3.0",
         "dompurify": "^2.3.3",
         "hotkeys-js": "^3.8.7",
-        "javascript-time-ago": "^2.3.8",
+        "javascript-time-ago": "^2.3.9",
         "mux.js": "^5.14.0",
         "register-service-worker": "^1.7.1",
         "shaka-player": "3.2.0",