README.md: Update link to Wikipedia Vi page

fixes: #14725

Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/README.md b/README.md
index 6e6cf11..5ac3a6c 100644
--- a/README.md
+++ b/README.md
@@ -18,7 +18,7 @@
 ## What is Vim?
 
 Vim is a greatly improved version of the good old UNIX editor
-[Vi](https://en.wikipedia.org/wiki/Vi).  Many new
+[Vi](https://en.wikipedia.org/wiki/Vi_(text_editor)).  Many new
 features have been added: multi-level undo, syntax highlighting, command line
 history, on-line help, spell checking, filename completion, block operations,
 script language, etc.  There is also a Graphical User Interface (GUI)