Update documentation v2

docs/07-extensions.md

@@ -23,14 +23,8 @@ echo $container;           // returns '(:SGVsbG8gV29ybGQ=: 42.0 42)'
 As a rule of thumb all the classes from this package are final and immutable and
 expose no particular interface.
 
-> [!IMPORTANT]
-> The `StructuredField` interface should be seen as an internal implementation detail 
-> and should not be implemented outside the package. While PHP does not prohibit such 
-> action, **you MUST NOT implement the `StructuredField` interface.**
-
-The reason for disallowing the `StructuredField` interface is simple. We want to ensure
-that in any situation the RFC is being respected. The contract is between the RFC and your
-code the package only acts as a link between both parties.
+The reason is to ensure that in any situation the RFC is being respected. The contract
+is between the RFC and your code the package only acts as a link between both parties.
 
 ## Closed for extension opened for composition
 

src/Item.php

@@ -43,7 +43,7 @@ public static function fromRfc8941(Stringable|string $httpValue): self
 
     /**
      * Returns a new instance from an HTTP Header or Trailer value string
-     * in compliance with RFC8941.
+     * in compliance with a published RFC.
      *
      * @see https://www.rfc-editor.org/rfc/rfc9651.html#section-3.3
      *