Fixed Javadoc typo.

Author: gmessner

src/main/java/org/gitlab4j/api/ProtectedBranchesApi.java

@@ -11,7 +11,7 @@
 
 /**
  * This class provides an entry point to all the Protected Branches API calls.
- * @see <a https://docs.gitlab.com/ee/api/protected_branches.html">Protected branches API at GitLab</a>
+ * @see <a href="https://docs.gitlab.com/ee/api/protected_branches.html">Protected branches API at GitLab</a>
  */
 public class ProtectedBranchesApi extends AbstractApi {