doc: remove $ signs from code examples

Signed-off-by: Hasan Turken <[email protected]>

README.md

@@ -68,20 +68,20 @@ Trace command aims to ease debugging and troubleshooting process by providing a
 It finds the relevant objects for a given one and provides detailed information.
 
 ```
-$ kubectl crossplane trace TYPE[.GROUP] NAME [-n| --namespace NAMESPACE]
+kubectl crossplane trace TYPE[.GROUP] NAME [-n| --namespace NAMESPACE]
 ```
 
 Examples:
 
 ```
 # Trace a KubernetesApplication
-$ kubectl crossplane trace KubernetesApplication wordpress-app-83f04457-0b1b-4532-9691-f55cf6c0da6e -n app-project1-dev
+kubectl crossplane trace KubernetesApplication wordpress-app-83f04457-0b1b-4532-9691-f55cf6c0da6e -n app-project1-dev
 
 # Trace a MySQLInstance
-$ kubectl crossplane trace MySQLInstance wordpress-mysql-83f04457-0b1b-4532-9691-f55cf6c0da6e -n app-project1-dev
+kubectl crossplane trace MySQLInstance wordpress-mysql-83f04457-0b1b-4532-9691-f55cf6c0da6e -n app-project1-dev
 
 # Graph output, which can be visualized with graphviz as follows.
-$ kubectl crossplane trace KubernetesApplication wordpress-app-83f04457-0b1b-4532-9691-f55cf6c0da6e -n app-project1-dev -o dot | dot -Tpng > /tmp/output.png
+kubectl crossplane trace KubernetesApplication wordpress-app-83f04457-0b1b-4532-9691-f55cf6c0da6e -n app-project1-dev -o dot | dot -Tpng > /tmp/output.png
 ```
 
 For more information, see [the trace command documentation](docs/trace-command.md).