Bump rxjs from 7.8.0 to 7.8.1 in /src-ui

Bumps [rxjs](https://github.com/reactivex/rxjs) from 7.8.0 to 7.8.1.
- [Release notes](https://github.com/reactivex/rxjs/releases)
- [Changelog](https://github.com/ReactiveX/rxjs/blob/7.8.1/CHANGELOG.md)
- [Commits](https://github.com/reactivex/rxjs/compare/7.8.0...7.8.1)

---
updated-dependencies:
- dependency-name: rxjs
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

src-ui/package.json

@@ -33,7 +33,7 @@
     "ngx-cookie-service": "^15.0.0",
     "ngx-file-drop": "^15.0.0",
     "ngx-ui-tour-ng-bootstrap": "^12.6.0",
-    "rxjs": "^7.8.0",
+    "rxjs": "^7.8.1",
     "tslib": "^2.4.1",
     "uuid": "^9.0.0",
     "zone.js": "^0.13.0"