[Fix] Update mmcv_maximum_version

[shun001]

Thanks for your contribution and we appreciate it a lot. The following instructions would make your pull request more healthy and more easily get feedback. If you do not understand some items, don't worry, just make the pull request and seek help from maintainers.

Motivation

Update mmcv_maximum_version.

Modification

Update mmcv_maximum_version to 2.3.0.

Checklist

1. Pre-commit or other linting tools are used to fix the potential lint issues.
2. The modification is covered by complete unit tests. If not, please add more unit test to ensure the correctness.
3. If the modification has potential influence on downstream projects, this PR should be tested with downstream projects, like MMDet or MMPreTrain.
4. The documentation has been modified accordingly, like docstring or example tutorials.

[CLAassistant]

All committers have signed the CLA.

[shun001]

这是来自QQ邮箱的自动回复邮件。您的来信已收到，我将及时处理。本邮件自动回复。                                                            ——lzs

[mmeendez8]

Is there any blocker for this?

[shun001]

这是来自QQ邮箱的自动回复邮件。您的来信已收到，我将及时处理。本邮件自动回复。                                                            ——lzs