patch 8.2.0236: MS-Windows unintall doesn't delete vimtutur.bat

Problem:    MS-Windows unintall doesn't delete vimtutur.bat.
Solution:   Change directory before deletion. (Ken Takata, closes #5603)
diff --git a/src/version.c b/src/version.c
index 6a5f2e7..7ca6baa 100644
--- a/src/version.c
+++ b/src/version.c
@@ -743,6 +743,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    236,
+/**/
     235,
 /**/
     234,