Update pages/spicedb/modeling/validation-testing-debugging.mdx

Co-authored-by: Evan Cordell <cordell.evan@gmail.com>

Author: tstirrat15

pages/spicedb/modeling/validation-testing-debugging.mdx

@@ -210,7 +210,7 @@ validation:
 
 As of version v0.25.0, `zed validate` command can take multiple files as arguments:
 
-```
+```sh
 zed validate some-validations.yaml some-other-validations.yaml
 ```