patch 8.2.0890: no color in terminal window when 'termguicolor' is set

Problem:    No color in terminal window when 'termguicolor' is set.
Solution:   Clear the underline color. (closes #6186)
diff --git a/src/version.c b/src/version.c
index ece5a39..986df70 100644
--- a/src/version.c
+++ b/src/version.c
@@ -747,6 +747,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    890,
+/**/
     889,
 /**/
     888,