fix: correct example syntax for java client

Signed-off-by: David Goss <david.goss@matillion.com>

Author: davidjgoss

clients/java/README.md

@@ -25,7 +25,7 @@ implementation 'io.github.marquezproject:marquez-java:0.39.0
 ### Reading Metadata
 ```java
 // Connect to http://localhost:5000
-MarquezClient client = MarquezClient().builder()
+MarquezClient client = MarquezClient.builder()
   .baseUrl("http://localhost:5000")
   .build()
 
@@ -59,4 +59,4 @@ MarquezClient client = MarquezClient.builder()
 
 ----
 SPDX-License-Identifier: Apache-2.0 
-Copyright 2018-2023 contributors to the Marquez project.
+Copyright 2018-2023 contributors to the Marquez project.