[stubsabot] Bump gevent to 26.4.*

Release: https://pypi.org/pypi/gevent/26.4.0
Homepage: http://www.gevent.org/
Repository: https://github.com/gevent/gevent
Typeshed stubs: https://github.com/python/typeshed/tree/main/stubs/gevent
Changelog: https://www.gevent.org/changelog.html
Diff: gevent/gevent@25.9.1...26.4.0

Stubsabot analysis of the diff between the two releases:
 - Total lines of Python code added: 400.
 - Total lines of Python code deleted: 26659.

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- Leave this PR open (as a reminder, and to prevent stubsabot from opening another PR)
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Author: stubsabot

stubs/gevent/METADATA.toml

@@ -1,4 +1,4 @@
-version = "25.9.*"
+version = "26.4.*"
 upstream-repository = "https://github.com/gevent/gevent"
 dependencies = ["types-greenlet", "types-psutil>=7.2.0"]