Update docs/book/v4/installation/faq.md

Co-authored-by: Alex Karajos <alex.merlin.1985@gmail.com>

Author: arhimede

docs/book/v4/installation/faq.md

@@ -32,4 +32,5 @@ chmod -R 777 public/uploads
 
 **Fix:**
 
-    chmod -R 777 log
+```shell
+chmod -R 777 log