patch 8.2.2925: Vim9: line continuation comment uses legacy syntax

Problem:    Vim9: line continuation comment uses legacy syntax.
Solution:   Check for #\ instead of "\. (closes #8295)
diff --git a/src/version.c b/src/version.c
index aaf27c1..188bb1a 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2925,
+/**/
     2924,
 /**/
     2923,