chore(deps): update dependency google-cloud-pubsub to v2.4.1

[renovate-bot]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
google-cloud-pubsub	==2.4.0 -> ==2.4.1

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Release Notes

googleapis/python-pubsub

v2.4.1

Compare Source

Bug Fixes

• Move await_msg_callbacks flag to subscribe() method, fixing a regression in Pub/Sub Lite client.
  (#​320) (d40d027)
• SSL error when using the client with the emulator. (#​297) (83db672)

Implementation Changes

• (samples) Bump the max_time to 10 minutes for a flaky test. (#​311) (e2678d4), closes #​291
• (samples) Mark delivery attempts test as flaky. (#​326) (5a97ef1)
• (samples) Mitigate flakiness in subscriber_tests. (#​304) (271a385)
• (samples) Retry InternalServerError in dead letter policy test. (#​329) (34c9b11), closes #​321

Documentation

• Remove EXPERIMENTAL tag for ordering keys in types.py. (#​323) (659cd7a)
• Remove EXPERIMENTAL tag from Schema service (via synth). (#​307) (ad85202)

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