docs(platform): quote YAML front-matter names containing a colon

Hugo's front-matter YAML parser rejected 'name: Identity: Users & Settings'
(mapping values are not allowed in this context). Quote the two affected
group names so the site builds.

Signed-off-by: Tamal Saha <tamal@appscode.com>

Author: tamalsaha

docs/platform/api/organizations-teams/_index.md

@@ -3,7 +3,7 @@ layout: docs
 menu:
   docsplatform_{{.version}}:
     identifier: api-organizations-teams
-    name: Identity: Organizations & Teams
+    name: "Identity: Organizations & Teams"
     parent: api
     weight: 20
 menu_name: docsplatform_{{.version}}

docs/platform/api/users-settings/_index.md

@@ -3,7 +3,7 @@ layout: docs
 menu:
   docsplatform_{{.version}}:
     identifier: api-users-settings
-    name: Identity: Users & Settings
+    name: "Identity: Users & Settings"
     parent: api
     weight: 10
 menu_name: docsplatform_{{.version}}