[Enhancement] Optimize the issue/pull request template of RocketMQ

[mxsm]

Before Creating the Enhancement Request

• I have confirmed that this should be classified as an enhancement rather than a bug/feature.

Summary

Optimize the issue/pull request template of RocketMQ

Motivation

Optimize the issue/pull request template of RocketMQ

Describe the Solution You'd Like

Optimize the issue/pull request template of RocketMQ

Describe Alternatives You've Considered

Optimize the issue/pull request template of RocketMQ

Additional Context

No response