gh-95986: Fix the example using match keyword (#95989)

180909 · web-flow · commit cd0fde27f965 · 2022-10-06T09:52:21.000-07:00
diff --git a/Doc/whatsnew/3.10.rst b/Doc/whatsnew/3.10.rst
@@ -669,6 +669,7 @@ Several other key features:
           GREEN = 1
           BLUE = 2
 
+      color = Color.GREEN
       match color:
           case Color.RED:
               print("I see red!")
