update test

Author: Mpdreamz

config/assembler.yml

@@ -103,7 +103,7 @@ references:
     edge: main
   ecs:
     current:  9.0
-    next: 9.1
+    next: 9.0
     edge: main
   logstash:
     current:  9.0

tests/docs-assembler.Tests/src/docs-assembler.Tests/AssemblerConfigurationTests.cs

@@ -73,7 +73,7 @@ public void ReadsVersions()
 		apmServer.GitReferenceEdge.Should().NotBeNullOrEmpty()
 			.And.Be("main");
 
-		var beats = config.ReferenceRepositories["apm-server"];
+		var beats = config.ReferenceRepositories["beats"];
 		beats.GitReferenceCurrent.Should().NotBeNullOrEmpty()
 			.And.NotBe("main");