Rename header of the gzip paragraph to more accurate and add short info aboaut...

Rename header of the gzip paragraph to more accurate and add short info aboaut what to do about serving gziped files [ci skip]

guides/source/asset_pipeline.md

@@ -1101,7 +1101,7 @@ Windows you have a JavaScript runtime installed in your operating system.
 
 
 
-### Serving GZipped version of assets
+### GZipping your assets
 
 By default, gzipped version of compiled assets will be generated, along with
 the non-gzipped version of assets. Gzipped assets help reduce the transmission
@@ -1111,6 +1111,8 @@ of data over the wire. You can configure this by setting the `gzip` flag.
 config.assets.gzip = false # disable gzipped assets generation
 ```
 
+Refer to your web server's documentation for instructions on how to serve gzipped assets.
+
 ### Using Your Own Compressor
 
 The compressor config settings for CSS and JavaScript also take any object.