chore: update CHANGELOG with PR link

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Co-authored-by: linear-code[bot] <222613912+linear-code[bot]@users.noreply.github.com>

Author: linear-code[bot]

CHANGELOG.md

@@ -18,7 +18,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Upgraded `dompurify` to `^3.4.11`. [#1332](https://github.com/sourcebot-dev/sourcebot/pull/1332)
 - Upgraded `nodemailer` to `^8.0.9`. [#1331](https://github.com/sourcebot-dev/sourcebot/pull/1331)
 - Upgraded `nodemailer` to `^8.0.11`. [#1328](https://github.com/sourcebot-dev/sourcebot/pull/1328)
-- Upgraded `@opentelemetry/core` to `^2.8.0`. [#PRNUM](https://github.com/sourcebot-dev/sourcebot/pull/PRNUM)
+- Upgraded `@opentelemetry/core` to `^2.8.0`. [#1343](https://github.com/sourcebot-dev/sourcebot/pull/1343)
 
 ## [5.0.3] - 2026-06-17