Add docs from gofiber/fiber@fd18830

Author: github-actions[bot]

docs/core/api/ctx.md

@@ -543,7 +543,7 @@ app.Get("/", func(c fiber.Ctx) error {
 
 ### Body
 
-As per the header `Content-Encoding`, this method will try to perform a file decompression from the **body** bytes. In case no `Content-Encoding` header is sent, it will perform as [BodyRaw](#bodyraw).
+As per the header `Content-Encoding`, this method will try to perform a file decompression from the **body** bytes. In case no `Content-Encoding` header is sent (or when it is set to `identity`), it will perform as [BodyRaw](#bodyraw). If an unknown or unsupported encoding is encountered, the response status will be `415 Unsupported Media Type` or `501 Not Implemented`.
 
 ```go title="Signature"
 func (c fiber.Ctx) Body() []byte