chore(agent): Improves code comment

Co-authored-by: Michal Nowacki <[email protected]>

agent/fw_drupal8.c

@@ -539,7 +539,7 @@ NR_PHP_WRAPPER_END
  * having to pass the lower case name of the class). If present then an attempt
  * is made to retrieve the 'VERSION' class constant. Both of these checks rely
  * on existing "nr_" routines that have been designed to be robust and will not
- * cause an issue if either check were to fail.
+ * cause an issue in user's application if either check were to fail.
  */
 void nr_drupal_version() {
   zval* zval_version = NULL;