Updated smnp.system (markdown)

smnp.system.md

@@ -1,12 +1,12 @@
 # Functions
 ## exit
-```
+```php
 exit(exitCode: int = 0)
 ```
 Immediately interrupts the script and returns given exit code to the system.
 
 ## sleep
-```
+```php
 sleep(milli: int)
 ```
 Suspends the script execution for a given time in milliseconds.