patch 8.2.4890: inconsistent capitalization in error messages

Problem:    Inconsistent capitalization in error messages.
Solution:   Make capitalization consistent. (Doug Kearns)
diff --git a/src/version.c b/src/version.c
index 1b781d9..d5b3333 100644
--- a/src/version.c
+++ b/src/version.c
@@ -747,6 +747,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4890,
+/**/
     4889,
 /**/
     4888,