Update Kafka DL script to 2.13-3.8.0 (#1856)

Fixes Kafka download script to use an available Kafka version.

## By Submitting this PR I confirm:
- I am familiar with the [Contributing Guidelines](https://github.com/nv-morpheus/Morpheus/blob/main/docs/source/developer_guide/contributing.md).
- When the PR is ready for review, new or existing tests cover these changes.
- When the PR is ready for review, the documentation is up to date with these changes.

Authors:
  - Christopher Harris (https://github.com/cwharris)

Approvers:
  - David Gardner (https://github.com/dagardner-nv)

URL: #1856

ci/scripts/download_kafka.py

@@ -20,8 +20,8 @@
 import pytest_kafka
 from pytest_kafka.install import set_up_kafka
 
-DEFAULT_KAFKA_URL = 'https://downloads.apache.org/kafka/3.5.2/kafka_2.13-3.5.2.tgz'
-DEFAULT_KAFKA_TAR_ROOTDIR = 'kafka_2.13-3.5.2/'
+DEFAULT_KAFKA_URL = 'https://downloads.apache.org/kafka/3.8.0/kafka_2.13-3.8.0.tgz'
+DEFAULT_KAFKA_TAR_ROOTDIR = 'kafka_2.13-3.8.0/'
 
 
 def main():