Fix categories in VS

Author: bart-vmware

src/Content/NetCoreTool.Template.WebApi/CSharp/.template.config/template.json

@@ -3,7 +3,7 @@
   "author": "Broadcom",
   "classifications": [
     "Web",
-    "WebAPI",
+    "Web API",
     "API",
     "Cloud",
     "Steeltoe"