fix: update bitnami image name to bitnamilegacy

Author: tadayosi

src/test/java/io/github/tadayosi/tensorflow/serving/client/TensorFlowServingTestSupport.java

@@ -10,7 +10,7 @@
 
 class TensorFlowServingTestSupport {
 
-    private static final String IMAGE_NAME = "bitnami/tensorflow-serving";
+    private static final String IMAGE_NAME = "bitnamilegacy/tensorflow-serving";
 
     @Container
     @SuppressWarnings("resource")