patch 8.2.2809: Vim9: :def function compilation fails when using :legacy

Problem:    Vim9: :def function compilation fails when using :legacy.
Solution:   Reset CMOD_LEGACY when compiling a function. (closes #8137)
diff --git a/src/version.c b/src/version.c
index 4b0b1cc..d235e94 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2809,
+/**/
     2808,
 /**/
     2807,