fix: add missing parameter

This got lost during the merge conflict resolution

Author: bevzzz

src/main/java/io/weaviate/client6/v1/internal/grpc/GrpcChannelOptions.java

@@ -20,7 +20,7 @@ public GrpcChannelOptions(String scheme, String host, int port, Map<String, Stri
   }
 
   private GrpcChannelOptions(String scheme, String host, int port, Metadata headers,
-      TokenProvider tokenProvider, TrustManagerFactory tmf, OptionalInt maxMessageSize, Timeout timeout) {
+      TokenProvider tokenProvider, TrustManagerFactory tmf, OptionalInt maxMessageSize, Timeout timeout, Proxy proxy) {
     super(scheme, host, port, headers, tokenProvider, tmf, timeout, proxy);
     this.maxMessageSize = maxMessageSize;
   }