update: readme with comments keys

Author: ui2code

README.md

@@ -22,10 +22,10 @@ You can see all installed snippets in `Tools > Snippets...`, in the sublime text
 - [Schema.org - s*](snippets/schema/)
 - [External - e*](snippets/external/)
 - [Comment](snippets/comment/)
-  - [HTML - hc*](snippets/comment/html)
-  - [CSS - cc*](snippets/comment/css)
-  - [JavaScript - jc*](snippets/comment/js)
-- [Structure data](snippets/structured-data) ***examples***
+  - [HTML - xc*](snippets/comment/html)
+  - [CSS - xc*](snippets/comment/css)
+  - [JavaScript - xc*](snippets/comment/js)
+- [Structure data](snippets/structured-data) (***examples***)
   - [Schema](snippets/structured-data/schema)
   - [JSON-LD](snippets/structured-data/json-ld)
   - [RDFa](snippets/structured-data/rdfa)