chore: update docu link

Author: mvach

README.MD

@@ -109,8 +109,7 @@ go build -o bin/ctRestClient ./main.go
 
 ## Documentation
 
-- [docs/manual-en.md](docs/manual-en.md) - Complete English user manual
-- [docs/manual-de.md](docs/manual-de.md) - Complete German user manual
+https://mvach.github.io/ctRestClient
 
 ## License