chore(deps): update dependency urllib3 to v1.26.3

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
urllib3 (source)	==1.26.2 -> ==1.26.3

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Release Notes

urllib3/urllib3

### [`v1.26.3`](https://togithub.com/urllib3/urllib3/releases/1.26.3) [Compare Source](https://togithub.com/urllib3/urllib3/compare/1.26.2...1.26.3) :warning: **IMPORTANT: urllib3 v2.0 will drop support for Python 2**: [Read more in the v2.0 Roadmap](https://urllib3.readthedocs.io/en/latest/v2-roadmap.html) - Fixed bytes and string comparison issue with headers (Pull [#​2141](https://togithub.com/urllib3/urllib3/issues/2141)) - Changed `ProxySchemeUnknown` error message to be more actionable if the user supplies a proxy URL without a scheme (Pull [#​2107](https://togithub.com/urllib3/urllib3/issues/2107)) **If you or your organization rely on urllib3 consider supporting us via [GitHub Sponsors](https://togithub.com/sponsors/urllib3)**

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