python3Packages.granian: refresh tests' TLS certs
granian up to 2.6.0 delivers TLS certificates in its test fixtures which
expired on Dec 1. This makes those tests fail. That's somehow good and
bad simultaneously, but anyways unfortunate.
This is fixed upstream, but not in a release. Fetch and apply the
appropriate patch manually.
(cherry picked from commit 24a82994c40a7dd4889f256e7d0f6f2defa1272f)
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