Increase fetch.min.bytes to 64kb for kafka buffer consumer

Signed-off-by: Taylor Gray <tylgry@amazon.com>

Author: graytaylor0

data-prepper-plugins/kafka-plugins/src/main/java/org/opensearch/dataprepper/plugins/kafka/buffer/BufferTopicConfig.java

@@ -27,7 +27,7 @@ class BufferTopicConfig extends CommonTopicConfig implements TopicProducerConfig
     static final boolean DEFAULT_AUTO_COMMIT = false;
     static final ByteCount DEFAULT_FETCH_MAX_BYTES = ByteCount.parse("50mb");
     static final Duration DEFAULT_FETCH_MAX_WAIT = Duration.ofMillis(1000);
-    static final ByteCount DEFAULT_FETCH_MIN_BYTES = ByteCount.parse("2kb");
+    static final ByteCount DEFAULT_FETCH_MIN_BYTES = ByteCount.parse("64kb");
     static final ByteCount DEFAULT_MAX_PARTITION_FETCH_BYTES = ByteCount.parse("1mb");
     static final Duration DEFAULT_SESSION_TIMEOUT = Duration.ofSeconds(45);
     static final String DEFAULT_AUTO_OFFSET_RESET = "earliest";