fixed calculating height of multi-line string was incorrect on IOS.
fixed typo.
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Merge pull request #7044 from Dhilan007/v3-label-improve

Ensuring release cache texture in timely.
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Merge pull request #7045 from heliclei/commit-status-desc

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Merge pull request #7042 from Dhilan007/v3-systemfont-ios

LinWenhai	fixed calculating height of multi-line string was incorrect on IOS.