patch 8.2.3875: gcc complains about buffer overrun

Problem:    gcc complains about buffer overrun.
Solution:   Use mch_memmove() instead of STRCPY(). (John Marriott)
diff --git a/src/version.c b/src/version.c
index 072e884..87ec33c 100644
--- a/src/version.c
+++ b/src/version.c
@@ -750,6 +750,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    3875,
+/**/
     3874,
 /**/
     3873,