Fix forwardRef warning on InnerNoticeBar component

[arlovip]

First of all, thank you for your contribution! :-)

Please makes sure that these checkboxes are checked before submitting your PR, thank you!

• Make sure that you follow antd's code convention.
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Extra checklist:

if isBugFix :

• Make sure that you add at least one unit test for the bug which you had fixed.

elif isNewFeature :

• Update API docs for the component.
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• Update TypeScript definition for the component.
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ref should be added to InnerNoticeBar component even though it's not used. Otherwise, a warning will be thrown:

 ERROR  Warning: forwardRef render functions accept exactly two parameters: props and ref. Did you forget to use the ref parameter?
    in App
    in RCTView (created by View)
    in View (created by AppContainer)
    in RCTView (created by View)
    in View (created by AppContainer)
    in AppContainer

issue link: https://github.com/ant-design/ant-design-mobile-rn/issues/1362

[1uokun]

Thanks for your pr