Mention Che Code sample in README instead of Theia

Fix #1027

Signed-off-by: Andrew Obuchowicz <aobuchow@redhat.com>

Author: AObuchow

README.md

@@ -162,7 +162,7 @@ To see all rules supported by the makefile, run `make help`
 
 ### Test run controller
 1. Take a look samples devworkspace configuration in `./samples` folder.
-2. Apply any of them by executing `kubectl apply -f ./samples/theia-latest.yaml -n <namespace>`
+2. Apply any of them by executing `kubectl apply -f ./samples/code-latest.yaml -n <namespace>`
 3. As soon as devworkspace is started you're able to get IDE url by executing `kubectl get devworkspace -n <namespace>`
 
 ### Run controller locally