Merge branch 'docs-new-fe-guide-style' into 'master'

Rename style to style guide in new frontend guide

See merge request gitlab-org/gitlab-ce!17725

doc/development/new_fe_guide/index.md

@@ -19,7 +19,7 @@ Guidance on topics related to development.
 
 Learn about all the dependencies that make up our frontend, including some of our own custom built libraries.
 
-## [Style](style/index.md)
+## [Style guides](style/index.md)
 
 Style guides to keep our code consistent.
 

doc/development/new_fe_guide/style/index.md

-# Style
+# Style guides
 
 ## [HTML style guide](html.md)