Fix typo in approval settings config (#501)

src/main/java/org/gitlab4j/api/models/ProjectApprovalsConfig.java

@@ -87,7 +87,7 @@ public class ProjectApprovalsConfig {
 	return new GitLabApiForm()
             .withParam("approvals_before_merge", approvalsBeforeMerge)
             .withParam("reset_approvals_on_push", resetApprovalsOnPush)
-            .withParam("disable_overriding_approvers_per_merge_reques", disableOverridingApproversPerMergeRequest)
+            .withParam("disable_overriding_approvers_per_merge_request", disableOverridingApproversPerMergeRequest)
             .withParam("merge_requests_author_approval", mergeRequestsAuthorApproval)
             .withParam("merge_requests_disable_committers_approval", mergeRequestsDisableCommittersApproval);
     }