address review comments in the docs

Author: supershal

docs/content/customization/generic/global-mirror.md

@@ -17,7 +17,7 @@ If your registry mirror requires a private or self-signed CA certificate,
 create a Kubernetes Secret with the `ca.crt` key populated with the CA certificate in PEM format:
 
 ```shell
-kubectl create secret generic my-mirror-ca-cert-secret \
+kubectl create secret generic my-mirror-ca-cert \
   --from-file=ca.crt=registry-ca.crt
 ```
 
@@ -35,7 +35,7 @@ spec:
             url: https://my-mirror.io
             credentials:
               secretRef:
-                name: my-mirror-ca-cert-secret
+                name: my-mirror-ca-cert
 ```
 
 Applying this configuration will result in following new files on the

pkg/handlers/generic/mutation/mirrors/variables_test.go

@@ -52,7 +52,7 @@ func TestVariableValidation(t *testing.T) {
 			ExpectError: true,
 		},
 		capitest.VariableTestDef{
-			Name: "registry URL without http(s) format and path",
+			Name: "mirror URL without format",
 			Vals: v1alpha1.GenericClusterConfig{
 				GlobalImageRegistryMirror: &v1alpha1.GlobalImageRegistryMirror{
 					URL: "a.b.c.example.com/a/b/c",