Added ReflectionParameter::getDocComment()

RFC: https://wiki.php.net/rfc/parameter-doccomments

Author: Christian Schneider

NEWS

@@ -100,6 +100,7 @@ PHP                                                                        NEWS
     (ilutov)
   . Fixed bug GH-21362 (ReflectionMethod::invoke/invokeArgs() did not verify
     Closure instance identity for Closure::__invoke()). (Ilia Alshanetsky)
+  . Added ReflectionParameter::getDocComment(). (chschneider)
 
 - Session:
   . Fixed bug 71162 (updateTimestamp never called when session data is empty).

UPGRADING

@@ -144,6 +144,8 @@ PHP 8.6 UPGRADE NOTES
   . ReflectionConstant::inNamespace()
   . Added ReflectionProperty::isReadable() and ReflectionProperty::isWritable().
     RFC: https://wiki.php.net/rfc/isreadable-iswriteable
+  . Added ReflectionParameter::getDocComment().
+    RFC: https://wiki.php.net/rfc/parameter-doccomments
 
 - Intl:
   . `grapheme_strrev()` returns strrev for grapheme cluster unit.