patch 8.2.4201: when using the GUI CTRL-Z does not stop gvim

Problem:    When using the GUI CTRL-Z does not stop gvim.
Solution:   When using the GUI set SIGTSTP to SIG_DFL. (Andrew Maltsev,
            closes #9570)
diff --git a/src/version.c b/src/version.c
index aa0910e..1ba9e1d 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4201,
+/**/
     4200,
 /**/
     4199,