Update dependency urllib3 to v1.26.12

This MR contains the following updates:

Package	Update	Change
urllib3 (source)	patch	==1.26.9 -> ==1.26.12

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Release Notes

urllib3/urllib3

v1.26.12

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• Deprecated the urllib3[secure] extra and the urllib3.contrib.pyopenssl module. Both will be removed in v2.x. See this GitHub issue <https://github.com/urllib3/urllib3/issues/2680>_ for justification and info on how to migrate.

v1.26.11

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• Fixed an issue where reading more than 2 GiB in a call to HTTMResponse.read would raise an OverflowError on Python 3.9 and earlier.

v1.26.10

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

• Removed support for Python 3.5
• Fixed an issue where a ProxyError recommending configuring the proxy as HTTP instead of HTTPS could appear even when an HTTPS proxy wasn't configured.

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