runtime(doc): update enum helptext

closes: #17112

Signed-off-by: Yegappan Lakshmanan <yegappan@yahoo.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/runtime/doc/vim9class.txt b/runtime/doc/vim9class.txt
index 5d6f7fc..5195456 100644
--- a/runtime/doc/vim9class.txt
+++ b/runtime/doc/vim9class.txt
@@ -1,4 +1,4 @@
-*vim9class.txt*	For Vim version 9.1.  Last change: 2025 Apr 05
+*vim9class.txt*	For Vim version 9.1.  Last change: 2025 Apr 13
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -1067,6 +1067,22 @@
       public const ordinal: number
     endclass
 <
+A enum can contain object variables and methods just like a regular
+class: >
+
+    enum Color
+	Cyan([0, 255, 255]),
+	Magenta([255, 0, 255]),
+	Gray([128, 128, 128])
+
+	var rgb_values: list<number>
+
+	def Get_RGB(): list<number>
+	    return this.rgb_values
+	enddef
+    endenum
+    echo Color.Magenta.Get_RGB()
+<
 ==============================================================================
 
 9.  Rationale