patch 8.2.4877: MS-Windows: Wrongly using Normal colors for termguicolors

Problem:    MS-Windows: Using Normal colors for termguicolors causes problems.
Solution:   Do not use Normal colors to set sg_gui_fg and sg_gui_bg.
            (Christian Brabandt, closes #10317, closes #10241)
diff --git a/src/version.c b/src/version.c
index 535d4eb..e3aa288 100644
--- a/src/version.c
+++ b/src/version.c
@@ -747,6 +747,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4877,
+/**/
     4876,
 /**/
     4875,