using inetSocketAddress.getHostString() instead of inetSocketAddress.getHostName() in StreamOutput

Signed-off-by: Paras Jain <parasjaz@amazon.com>

Author: Paras Jain

server/src/main/java/org/opensearch/common/io/stream/StreamOutput.java

@@ -795,7 +795,7 @@ public final void writeOptionalInstant(@Nullable Instant instant) throws IOExcep
         writers.put(InetSocketAddress.class, (o, v) -> {
             final InetSocketAddress inetSocketAddress = (InetSocketAddress) v;
             o.writeByte((byte) 27);
-            o.writeString(inetSocketAddress.getHostName());
+            o.writeString(inetSocketAddress.getHostString());
             o.writeByteArray(inetSocketAddress.getAddress().getAddress());
             o.writeInt(inetSocketAddress.getPort());
         });