Update dependency io.sentry:sentry to v6.4.3

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
io.sentry:sentry	6.4.2 -> 6.4.3

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Release Notes

getsentry/sentry-java

### [`v6.4.3`](https://togithub.com/getsentry/sentry-java/releases/tag/6.4.3) [Compare Source](https://togithub.com/getsentry/sentry-java/compare/6.4.2...6.4.3) - Fix slow and frozen frames tracking ([#​2271](https://togithub.com/getsentry/sentry-java/pull/2271))

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