Update dependency urllib3 to v1.26.9

This MR contains the following updates:

Package	Type	Update	Change
urllib3 (source)	ironbank-pypi	patch	1.26.8 -> 1.26.9

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Release Notes

urllib3/urllib3

v1.26.9

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⚠ urllib3 v2.0 will drop support for Python 2: Read more in the v2.0 Roadmap

⚠ This release will be the last release supporting Python 3.5. Please upgrade to a non-EOL Python version.

• Changed urllib3[brotli] extra to favor installing Brotli libraries that are still receiving updates like brotli and brotlicffi instead of brotlipy. This change does not impact behavior of urllib3, only which dependencies are installed.
• Fixed a socket leaking when HTTPSConnection.connect() raises an exception.
• Fixed server_hostname being forwarded from PoolManager to HTTPConnectionPool when requesting an HTTP URL. Should only be forwarded when requesting an HTTPS URL.

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