test: build mock-rock 1.0

Author: clay-lake

.github/workflows/Build_External_Rock.yaml

@@ -14,4 +14,4 @@ jobs:
             oci-archive-name: "external_mock-rock"
             rock-repo: clay-lake/mock-rock
             rock-repo-commit: main
-            rockfile-directory: /mock-rock/1.1/
+            rockfile-directory: /mock-rock/1.0/