fix(status): improve 214 status description content

content/214.md

@@ -1,14 +1,20 @@
 ## Description
 
-The HTTP `214 Transformation Applied` Is a warning code.
+<aside class="alert"><strong>Deprecated:</strong> The HTTP 214 Transformation Applied status code and the Warning HTTP Header have been deprecated.</aside>
 
-This Warning code MUST be added by a proxy if it applies any
-transformation to the representation, such as changing the
-content-coding, media-type, or modifying the representation data,
-unless this Warning code already appears in the response.
+The HTTP `214 Transformation Applied` is an unofficial status code used in combination
+with the [Warning HTTP header](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Warning) and included with HTTP response messages to indicate
+that a transformation has been applied to the representation.
 
-  ### See Also
-  - [Spec](https://datatracker.ietf.org/doc/html/rfc7234#section-5.5.6)
-  - [WebConcepts](https://webconcepts.info/concepts/http-warn-code/214)
+This status code and `Warning` header MUST be added by a proxy if it applies any
+transformation to the representation, such as changing the `content-coding`,
+`media-type`, or modifying the representation data, unless the `Warning` header
+already appears in the response.
 
-  **Source:** [https://datatracker.ietf.org/doc/html/rfc7234#section-5.5.6](https://datatracker.ietf.org/doc/html/rfc7234#section-5.5.6)
+### See Also
+
+- [Spec](https://datatracker.ietf.org/doc/html/rfc7234#section-5.5.6)
+- [WebConcepts](https://webconcepts.info/concepts/http-warn-code/214)
+- [HTTP Warning Header](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Warning)
+
+**Source:** [https://datatracker.ietf.org/doc/html/rfc7234#section-5.5.6](https://datatracker.ietf.org/doc/html/rfc7234#section-5.5.6)