chore(deps): update dependency urllib3 to v1.26.1

[renovate[bot]]

This PR contains the following updates:

Package	Update	Change
urllib3 (source)	patch	==1.26.0 -> ==1.26.1

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Release Notes

urllib3/urllib3

### [`v1.26.1`](https://togithub.com/urllib3/urllib3/blob/master/CHANGES.rst#​1261-2020-11-11) [Compare Source](https://togithub.com/urllib3/urllib3/compare/1.26.0...1.26.1) - Fixed an issue where two `User-Agent` headers would be sent if a `User-Agent` header key is passed as `bytes` (Pull [#​2047](https://togithub.com/urllib3/urllib3/issues/2047))

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