chore(deps): update dependency urllib3 to v1.26.20

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
urllib3 (changelog)	==1.26.15 -> ==1.26.20

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Release Notes

urllib3/urllib3 (urllib3)

v1.26.20

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🚀 urllib3 is fundraising for HTTP/2 support

urllib3 is raising ~$40,000 USD to release HTTP/2 support and ensure long-term sustainable maintenance of the project after a sharp decline in financial support for 2023. If your company or organization uses Python and would benefit from HTTP/2 support in Requests, pip, cloud SDKs, and thousands of other projects please consider contributing financially to ensure HTTP/2 support is developed sustainably and maintained for the long-haul.

Thank you for your support.

Changes

• Fixed a crash where certain standard library hash functions were absent in FIPS-compliant environments. (#​3432)
• Replaced deprecated dash-separated setuptools entries in setup.cfg. (#​3461)
• Took into account macOS setting ECONNRESET instead of EPROTOTYPE in its newer versions. (#​3416)
• Backported changes to our tests and CI configuration from v2.x to support testing with CPython 3.12 and 3.13. (#​3436)

Full Changelog: urllib3/urllib3@1.26.19...1.26.20

v1.26.19

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====================

• Added the Proxy-Authorization header to the list of headers to strip from requests when redirecting to a different host. As before, different headers can be set via Retry.remove_headers_on_redirect.
• Fixed handling of OpenSSL 3.2.0 new error message for misconfiguring an HTTP proxy as HTTPS. (#&#8203;3405 <https://github.com/urllib3/urllib3/issues/3405>__)

v1.26.18

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====================

• Made body stripped from HTTP requests changing the request method to GET after HTTP 303 "See Other" redirect responses.

v1.26.17

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====================

• Added the Cookie header to the list of headers to strip from requests when redirecting to a different host. As before, different headers can be set via Retry.remove_headers_on_redirect. (#&#8203;3139 <https://github.com/urllib3/urllib3/pull/3139>_)

v1.26.16

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====================

• Fixed thread-safety issue where accessing a PoolManager with many distinct origins
  would cause connection pools to be closed while requests are in progress (#&#8203;2954 <https://github.com/urllib3/urllib3/pull/2954>_)

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