fix(kubernetes): Fix spaces in error message on artifact bind failure (…

…#4357)

Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

clouddriver-kubernetes-v2/src/main/java/com/netflix/spinnaker/clouddriver/kubernetes/v2/op/manifest/KubernetesDeployManifestOperation.java

@@ -138,8 +138,8 @@ public OperationResult operate(List _unused) {
     if (!unboundArtifacts.isEmpty()) {
       throw new IllegalArgumentException(
           String.format(
-              "The following required artifacts could not be bound: '%s'."
-                  + "Check that the Docker image name above matches the name used in the image field of your manifest."
+              "The following required artifacts could not be bound: '%s'. "
+                  + "Check that the Docker image name above matches the name used in the image field of your manifest. "
                   + "Failing the stage as this is likely a configuration error.",
               unboundArtifacts));
     }