patch 8.2.3892: when modifyOtherKeys is used CTRL-C is not recognized

Problem:    When modifyOtherKeys is used CTRL-C is not recognized.
Solution:   Check for uppercase C as well, fix minimum length.
diff --git a/src/version.c b/src/version.c
index 6d23fa8..bca7604 100644
--- a/src/version.c
+++ b/src/version.c
@@ -750,6 +750,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    3892,
+/**/
     3891,
 /**/
     3890,