move disclaimer

Author: CodeShellDev

docs/features/features.md

@@ -20,7 +20,7 @@ Look at this complex template for example:
 {{{ #://configuration/examples/message-template.yml }}}
 ```
 
-It can extract needed data from the body and even the headers (with an exception of the `Authorization` Header) and then process them using Go's Templating Library
+It can extract needed data from the body and even the headers ([exceptions](./usage/advanced)) and then process them using Go's Templating Library
 and finally output a message packed with so much information.
 
 Head to [Configuration](./configuration/message-templates) to see how-to use.

docs/usage/advanced.md

@@ -17,7 +17,7 @@ These can be especially **helpful** if have to manage multiple **Variables** and
 | Type                                   | Example             | Note             |
 | :------------------------------------- | :------------------ | :--------------- |
 | Body                                   | `{{@data.key}}`     |                  |
-| Header                                 | `{{#Content_Type}}` | `-` becomes `_`  |
+| Header (except `Authorization`)        | `{{#Content_Type}}` | `-` becomes `_`  |
 | [Variable](../configuration/variables) | `{{.VAR}}`          | always uppercase |
 
 ### Where to use