fix(deps): update dependency rxjs to v7.5.7

Author: renovate[bot]

spring-boot-admin-server-ui/package-lock.json

@@ -43,7 +43,7 @@
     "popper.js": "1.16.1",
     "pretty-bytes": "6.0.0",
     "resize-observer-polyfill": "1.5.1",
-    "rxjs": "7.5.6",
+    "rxjs": "7.5.7",
     "vue": "2.7.10",
     "vue-clickaway2": "2.3.2",
     "vue-i18n": "8.27.2",