patch 8.2.4828: fix for unmapping simplified key not fully tested

Problem:    Fix for unmapping simplified key not fully tested.
Solution:   Add a test case. (closes #10292)
diff --git a/src/version.c b/src/version.c
index 2998d2d..945b6a1 100644
--- a/src/version.c
+++ b/src/version.c
@@ -747,6 +747,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4828,
+/**/
     4827,
 /**/
     4826,