fix bool to bool? for create webhook request

Author: jetersen

src/GitLabApiClient/Models/Webhooks/Requests/CreateWebhookRequest.cs

@@ -16,37 +16,37 @@ public sealed class CreateWebhookRequest
         public string Url { get; set; }
 
         [JsonProperty("push_events")]
-        public bool PushEvents { get; set; }
+        public bool? PushEvents { get; set; }
 
         [JsonProperty("push_events_branch_filter")]
         public string PushEventsBranchFilter { get; set; }
 
         [JsonProperty("issues_events")]
-        public bool IssuesEvents { get; set; }
+        public bool? IssuesEvents { get; set; }
 
         [JsonProperty("confidential_issues_events")]
-        public bool ConfidentialIssuesEvents { get; set; }
+        public bool? ConfidentialIssuesEvents { get; set; }
 
         [JsonProperty("merge_requests_events")]
-        public bool MergeRequestsEvents { get; set; }
+        public bool? MergeRequestsEvents { get; set; }
 
         [JsonProperty("tag_push_events")]
-        public bool TagPushEvents { get; set; }
+        public bool? TagPushEvents { get; set; }
 
         [JsonProperty("note_events")]
-        public bool NoteEvents { get; set; }
+        public bool? NoteEvents { get; set; }
 
         [JsonProperty("job_events")]
-        public bool JobEvents { get; set; }
+        public bool? JobEvents { get; set; }
 
         [JsonProperty("pipeline_events")]
-        public bool PipelineEvents { get; set; }
+        public bool? PipelineEvents { get; set; }
 
         [JsonProperty("wiki_page_events")]
-        public bool WikiPageEvents { get; set; }
+        public bool? WikiPageEvents { get; set; }
 
         [JsonProperty("enable_ssl_verification")]
-        public bool EnableSslVerification { get; set; }
+        public bool? EnableSslVerification { get; set; }
 
         [JsonProperty("token")]
         public string Token { get; set; }