scratch.md: Whitespace

Author: gg7

docs/getting-started-guides/scratch.md

@@ -662,7 +662,7 @@ Complete this template for the scheduler pod:
         ],
         "livenessProbe": {
           "httpGet": {
-            "host" : "127.0.0.1",
+            "host": "127.0.0.1",
             "path": "/healthz",
             "port": 10251
           },