chore(master): 🔖 release 1.5.1

[github-actions[bot]]

:robot: I have created a release beep boop

1.5.1 (2024-04-26)

Bug Fixes

• 🐛 fix private msg letter case (c05373e)
• 🔖 set metadata version to 1.5.0 (ccaf82b)

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[github-actions[bot]]

:robot: Release is at https://github.com/AnzhiZhang/ChatHub/releases/tag/v1.5.1 :sunflower: