patch 9.1.0612: filetype: deno.lock file not recognized

Problem:  filetype: deno.lock file not recognized
Solution: detect 'deno.lock' as json filetype
          (カワリミ人形)

Reference:
https://docs.deno.com/runtime/manual/basics/modules/integrity_checking/#caching-and-lock-files

closes: #15333

Signed-off-by: カワリミ人形 <kawarimidoll+git@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>

src/version.c

@@ -704,6 +704,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    612,
 /**/
     611,
 /**/