patch 8.2.2721: Vim9: cannot have a linebreak inside a lambda

Problem:    Vim9: cannot have a linebreak inside a lambda.
Solution:   Compile the expression before the arguments.
diff --git a/src/version.c b/src/version.c
index 358ff07..331ccdb 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2721,
+/**/
     2720,
 /**/
     2719,