Use commitAcitivty in HasChild query

Author: russcam

src/Tests/Tests/QueryDsl/Joining/HasChild/HasChildQueryUsageTests.cs

@@ -20,7 +20,7 @@ public HasChildUsageTests(ReadOnlyCluster i, EndpointUsage usage) : base(i, usag
 		{
 			Name = "named_query",
 			Boost = 1.1,
-			Type = Infer.Relation<Developer>(),
+			Type = Infer.Relation<CommitActivity>(),
 			InnerHits = new InnerHits { Explain = true },
 			MaxChildren = 5,
 			MinChildren = 1,
@@ -34,7 +34,7 @@ public HasChildUsageTests(ReadOnlyCluster i, EndpointUsage usage) : base(i, usag
 			{
 				_name = "named_query",
 				boost = 1.1,
-				type = "developer",
+				type = "commitActivity",
 				score_mode = "avg",
 				min_children = 1,
 				max_children = 5,
@@ -44,7 +44,7 @@ public HasChildUsageTests(ReadOnlyCluster i, EndpointUsage usage) : base(i, usag
 		};
 
 		protected override QueryContainer QueryFluent(QueryContainerDescriptor<Project> q) => q
-			.HasChild<Developer>(c => c
+			.HasChild<CommitActivity>(c => c
 				.Name("named_query")
 				.Boost(1.1)
 				.InnerHits(i => i.Explain())