Bump prop-types from 15.7.2 to 15.8.1 in /awx/ui

Bumps [prop-types](https://github.com/facebook/prop-types) from 15.7.2 to 15.8.1.
- [Release notes](https://github.com/facebook/prop-types/releases)
- [Changelog](https://github.com/facebook/prop-types/blob/main/CHANGELOG.md)
- [Commits](https://github.com/facebook/prop-types/compare/v15.7.2...v15.8.1)

---
updated-dependencies:
- dependency-name: prop-types
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

awx/ui/package.json

@@ -23,7 +23,7 @@
     "html-entities": "2.3.2",
     "js-yaml": "4.1.0",
     "luxon": "^3.0.1",
-    "prop-types": "^15.6.2",
+    "prop-types": "^15.8.1",
     "react": "17.0.2",
     "react-ace": "^10.1.0",
     "react-dom": "17.0.2",