Update CookieInjection.ql to remove period

Author: felicitymay

python/ql/src/Security/CWE-020/CookieInjection.ql

@@ -1,5 +1,5 @@
 /**
- * @name Construction of a cookie using user-supplied input.
+ * @name Construction of a cookie using user-supplied input
  * @description Constructing cookies from user input may allow an attacker to perform a Cookie Poisoning attack.
  * @kind path-problem
  * @problem.severity warning