Bump rocketmq-namesrv from 4.9.4 to 4.9.6 in /rocketmq-spark#915

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dependabot/maven/rocketmq-spark/org.apache.rocketmq-rocketmq-namesrv-4.9.6apache/rocketmq-externals:dependabot/maven/rocketmq-spark/org.apache.rocketmq-rocketmq-namesrv-4.9.6Copy head branch name to clipboard