patch 8.2.1856: "2resize" uses size of current window

Problem:    "2resize" uses size of current window.
Solution:   Use size of resized window. (Yasuhiro Matsumoto, closes #7152)
diff --git a/src/version.c b/src/version.c
index cc98769..ff532f1 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1856,
+/**/
     1855,
 /**/
     1854,