fix(deps): lock file maintenance workers (#3115)

This PR contains the following updates:

| Package | Type | Update | Change | Age | Adoption | Passing |
Confidence |
|---|---|---|---|---|---|---|---|
|  |  | lockFileMaintenance | All locks refreshed |  |  |  |  |
|
[google-cloud-pubsub](https://redirect.github.com/googleapis/python-pubsub)
| project.dependencies | minor | `==2.27.3` -> `==2.28.0` |
[![age](https://developer.mend.io/api/mc/badges/age/pypi/google-cloud-pubsub/2.28.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/pypi/google-cloud-pubsub/2.28.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/pypi/google-cloud-pubsub/2.27.3/2.28.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/pypi/google-cloud-pubsub/2.27.3/2.28.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

🔧 This Pull Request updates lock files to use the latest dependency
versions.

---

### Release Notes

<details>
<summary>googleapis/python-pubsub (google-cloud-pubsub)</summary>

###
[`v2.28.0`](https://redirect.github.com/googleapis/python-pubsub/blob/HEAD/CHANGELOG.md#2280-2025-01-30)

[Compare
Source](https://redirect.github.com/googleapis/python-pubsub/compare/v2.27.3...v2.28.0)

##### Features

- Add support for message transforms to Topic and Subscription
([#&#8203;1274](https://redirect.github.com/googleapis/python-pubsub/issues/1274))
([e5e2f3f](https://redirect.github.com/googleapis/python-pubsub/commit/e5e2f3f732f451d14dfb4c37ae979e5c04045305))

##### Bug Fixes

- Get channel target for a gRPC request
([#&#8203;1339](https://redirect.github.com/googleapis/python-pubsub/issues/1339))
([16ea766](https://redirect.github.com/googleapis/python-pubsub/commit/16ea76611d121700a3f3119d18919063d12c81c1))
- Set creds only if transport not provided
([#&#8203;1348](https://redirect.github.com/googleapis/python-pubsub/issues/1348))
([59965a4](https://redirect.github.com/googleapis/python-pubsub/commit/59965a4804a434467a47815cdbdd5ce31bbb3662))

</details>

---

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Author: renovate-bot

gcp/workers/worker/poetry.lock

@@ -4,7 +4,7 @@ requires-python = ">=3.11,<4.0"
 dependencies = [
     "google-auth-httplib2==0.2.0",
     "google-api-python-client==2.160.0",
-    "google-cloud-pubsub==2.27.3",
+    "google-cloud-pubsub==2.28.0",
     "google-cloud-ndb==2.3.2",
     "google-cloud-storage==2.19.0",
     "pyyaml==6.0.2",