patch 8.2.2228: Vim9: cannot use ":e #" because # starts a comment

Problem:    Vim9: cannot use ":e #" because # starts a comment.
Solution:   Support using %% instead of #.
diff --git a/src/version.c b/src/version.c
index f9216ce..985e48e 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2228,
+/**/
     2227,
 /**/
     2226,