chore: librarian release pull request: 20260331T202405Z (#14314)

PR created by the Librarian CLI to initialize a release. Merging this PR
will auto trigger a release.

Librarian Version: v0.8.3
Language Image:
us-central1-docker.pkg.dev/cloud-sdk-librarian-prod/images-prod/librarian-go@sha256:f8558b849eab319c3b9fc0b0ee8cab738b7e0b88e746275c759b38b194247a42
<details><summary>pubsub: v1.50.2</summary>

##
[v1.50.2](pubsub/v1.50.1...pubsub/v1.50.2)
(2026-03-31)

### Bug Fixes

* check for nil concurrency control span (#14303)
([4c0232a](4c0232a7))

</details>

Author: hongalex

.librarian/state.yaml

@@ -1619,7 +1619,7 @@ libraries:
     remove_regex: []
     tag_format: '{id}/v{version}'
   - id: pubsub
-    version: 1.50.1
+    version: 1.50.2
     last_generated_commit: ""
     apis: []
     source_roots:

pubsub/CHANGES.md

@@ -1,5 +1,11 @@
 # Changes
 
+## [1.50.2](https://github.com/googleapis/google-cloud-go/releases/tag/pubsub%2Fv1.50.2) (2026-03-31)
+
+### Bug Fixes
+
+* check for nil concurrency control span (#14303) ([4c0232a](https://github.com/googleapis/google-cloud-go/commit/4c0232a7c1197769af2d6c6a4378c02089ae2955))
+
 ## [1.50.1](https://github.com/googleapis/google-cloud-go/compare/pubsub/v1.50.0...pubsub/v1.50.1) (2025-09-04)