Allow empty container options (#4208)

src/Sdk/DTPipelines/workflow-v1.0.json

@@ -421,7 +421,7 @@
       "mapping": {
         "properties": {
           "image": "string",
-          "options": "non-empty-string",
+          "options": "string",
           "env": "container-env",
           "ports": "sequence-of-non-empty-string",
           "volumes": "sequence-of-non-empty-string",

src/Sdk/WorkflowParser/workflow-v1.0.json

@@ -2593,7 +2593,7 @@
             "description": "Use `jobs.<job_id>.container.image` to define the Docker image to use as the container to run the action. The value can be the Docker Hub image or a registry name."
           },
           "options": {
-            "type": "non-empty-string",
+            "type": "string",
             "description": "Use `jobs.<job_id>.container.options` to configure additional Docker container resource options."
           },
           "env": "container-env",