fix: ui/package.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-JSYAML-13961110

Author: snyk-bot

ui/package.json

@@ -39,7 +39,7 @@
     "git-url-parse": "^11.1.2",
     "html-webpack-plugin": "^3.2.0",
     "jest-junit": "^6.4.0",
-    "js-yaml": "^3.13.1",
+    "js-yaml": "^4.1.1",
     "json-merge-patch": "^0.2.3",
     "minimatch": "^3.0.4",
     "moment": "^2.24.0",
@@ -61,7 +61,7 @@
     "react-router": "^4.3.1",
     "react-router-dom": "^4.2.2",
     "react-svg-piechart": "^2.1.1",
-    "redoc": "^2.0.0-rc.40",
+    "redoc": "^2.0.0",
     "sass-loader": "^6.0.6",
     "source-map-loader": "^0.2.3",
     "style-loader": "^0.20.1",