patch 8.1.0462: when using ConPTY Vim can be a child process

Problem:    When using ConPTY Vim can be a child process.
Solution:   To find a Vim window use both EnumWindows() and
            EnumChildWindows(). (Nobuhiro Takasaki, closes #3521)
diff --git a/src/version.c b/src/version.c
index 93cbc30..103483a 100644
--- a/src/version.c
+++ b/src/version.c
@@ -793,6 +793,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    462,
+/**/
     461,
 /**/
     460,