patch 8.2.0993: Vim9 script test fails with normal features

Problem:    Vim9 script test fails with normal features.
Solution:   Use :func instead of :def for now.
diff --git a/src/version.c b/src/version.c
index c1d8ca0..c97a089 100644
--- a/src/version.c
+++ b/src/version.c
@@ -755,6 +755,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    993,
+/**/
     992,
 /**/
     991,