patch 8.0.1811: no test for winrestcmd()

Problem:    No test for winrestcmd().
Solution:   Add a test. (Dominique Pelle, closes #2894)
diff --git a/src/version.c b/src/version.c
index 59b25bf..d8819ae 100644
--- a/src/version.c
+++ b/src/version.c
@@ -762,6 +762,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1811,
+/**/
     1810,
 /**/
     1809,