Get rid of warning.

backend/src/Squidex.Infrastructure/EventSourcing/EnvelopeHeaders.cs

@@ -20,7 +20,7 @@ namespace Squidex.Infrastructure.EventSourcing
         {
         }
 
-        public EnvelopeHeaders Clone()
+        public EnvelopeHeaders CloneHeaders()
         {
             return new EnvelopeHeaders(this);
         }

backend/src/Squidex.Infrastructure/EventSourcing/Envelope{T}.cs

@@ -33,7 +33,7 @@ namespace Squidex.Infrastructure.EventSourcing
 
         public Envelope<TOther> To<TOther>() where TOther : class, IEvent
         {
-            return new Envelope<TOther>((payload as TOther)!, headers.Clone());
+            return new Envelope<TOther>((payload as TOther)!, headers.CloneHeaders());
         }
 
         public static implicit operator Envelope<IEvent>(Envelope<T> source)

backend/tests/Squidex.Infrastructure.Tests/EventSourcing/EnvelopeHeadersTests.cs

@@ -37,7 +37,7 @@ namespace Squidex.Infrastructure.EventSourcing
         {
             var headers = new EnvelopeHeaders(JsonValue.Object().Add("Key1", 123));
 
-            var clone = headers.Clone();
+            var clone = headers.CloneHeaders();
 
             CompareHeaders(headers, clone);
         }