Update dependency urllib3 to v1.26.20 (2.7)

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This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
urllib3 (changelog)	==1.26.19 -> ==1.26.20

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Release Notes

urllib3/urllib3 (urllib3)

v1.26.20

Compare Source

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

• Fixed a crash where certain standard library hash functions were absent in
  FIPS-compliant environments.
  (#&#8203;3432 <https://github.com/urllib3/urllib3/issues/3432>__)
• Replaced deprecated dash-separated setuptools entries in setup.cfg.
  (#&#8203;3461 <https://github.com/urllib3/urllib3/pull/3461>__)
• Took into account macOS setting ECONNRESET instead of EPROTOTYPE in
  its newer versions.
  (#&#8203;3416 <https://github.com/urllib3/urllib3/pull/3416>__)
• Backported changes to our tests and CI configuration from v2.x to support
  testing with CPython 3.12 and 3.13.
  (#&#8203;3436 <https://github.com/urllib3/urllib3/pull/3436>__)

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