changes to README.md

Author: Kyriakos Akriotis

README.md

@@ -24,13 +24,13 @@ kubectl apply -f config/samples/
 2. Build and push your image to the location specified by `IMG`:
 
 ```sh
-make docker-build docker-push IMG=<some-registry>/kube-dosbox:tag
+make docker-build docker-push IMG=<some-registry>/kube-dosbox:<tag>
 ```
 
 3. Deploy the controller to the cluster with the image specified by `IMG`:
 
 ```sh
-make deploy IMG=<some-registry>/kube-dosbox:tag
+make deploy IMG=<some-registry>/kube-dosbox:<tag>
 ```
 
 ### Uninstall CRDs