patch 9.0.1235: MS-Windows console: not flushing termguicolors

Problem:    MS-Windows console: not flushing termguicolors.
Solution:   Flush termguicolors. (Christopher Plewright, closes #11871)
diff --git a/src/version.c b/src/version.c
index 831b643..3e853b3 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1235,
+/**/
     1234,
 /**/
     1233,