patch 9.0.0847: CI: not totally clear what MS-Windows version is used

Problem:    CI: not totally clear what MS-Windows version is used.
Solution:   Show the Windows version. (Ken Takata, closes #11524)
diff --git a/src/version.c b/src/version.c
index f305f3c..5cc1b02 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    847,
+/**/
     846,
 /**/
     845,