Merge branch 'change-vtr-docs-link' into 'master'

Change VTR Docs Link

See merge request 90cos/mttl!315

frontend/src/App.js

@@ -10,7 +10,7 @@ import Roadmap from "./Roadmap";
 import * as metrics_data from './data/metrics.min.json';
 
 const docs = "https://90cos.gitlab.io/mttl/documentation"
-const vtr_docs = "https://90cos-virtual-training-records.gitlab.io/vtr-docs/"
+const vtr_docs = "https://90cos.gitlab.io/cyt/training-systems/vtr-system/"
 const playlist = "https://www.youtube.com/playlist?list=PL79OPuC-kzYx_-GpeKYDtP8XPYh7dYGxm"
 const lessons = "https://gitlab.com/90cos/cyt/training/modules"
 const kumu = "https://embed.kumu.io/2e6c3a7ed30c0a4e248b51b41382d736"