Add the missing semicolon in the code example (#4405)

Co-authored-by: Brett McBride <[email protected]>
Co-authored-by: svrnm <[email protected]>

Author: 3 people

content/en/docs/languages/php/instrumentation.md

@@ -404,7 +404,7 @@ class Dice {
 
     private function rollOnce() {
       $result = random_int(1, 6);
-      return $result
+      return $result;
     }
 }
 ```