patch 9.1.0235: filetype: supertux files are not recognized

Problem:  filetype: supertux files are not recognized
Solution: Supertux uses lisp to store hotkeys in config and game stage information,
          so add a pattern for supertux files.
          (Wu, Zhenyu)

Reference: https://github.com/SuperTux/supertux/wiki/S-Expression

closes: #14356

Signed-off-by: Wu, Zhenyu <wuzhenyu@ustc.edu>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/version.c b/src/version.c
index a5395e9..439c4e7 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    235,
+/**/
     234,
 /**/
     233,