patch 9.0.1503: Luau files are not recognized

Problem:    Luau files are not recognized.
Solution:   Add a patter for Luau files. (Amaan Qureshi, closes #12317)
diff --git a/src/version.c b/src/version.c
index 47b38cd..338399c 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1503,
+/**/
     1502,
 /**/
     1501,