chore: changelog link to PR #1507 instead of issue #1506

Coding guidelines: changelog entries must reference the PR id, not
the issue. The previous link pointed at the issue (which is what was
known at the time the entry was written). This aligns the entry
with the convention.

Author: Harsh23Kashyap

CHANGELOG.md

@@ -8,7 +8,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## [Unreleased]
 
 ### Added
-- Added a `GET /api/health/ready` endpoint that returns per-dependency health (Postgres, Redis, Zoekt) for use as a Kubernetes `readinessProbe` or load-balancer health check. The existing `GET /api/health` endpoint is unchanged and remains the liveness probe. [#1506](https://github.com/sourcebot-dev/sourcebot/issues/1506)
+- Added a `GET /api/health/ready` endpoint that returns per-dependency health (Postgres, Redis, Zoekt) for use as a Kubernetes `readinessProbe` or load-balancer health check. The existing `GET /api/health` endpoint is unchanged and remains the liveness probe. [#1507](https://github.com/sourcebot-dev/sourcebot/pull/1507)
 
 ### Changed
 - Vulnerability triage now keeps Linear issues synchronized with current security findings.