Update upgrade.mdx

Author: Rhia2

docs/admin/deploy/kubernetes/upgrade.mdx

@@ -132,7 +132,7 @@ To perform a **manual** multi-version upgrade on a Sourcegraph instance running
    - Check the [upgrade notes](/admin/updates/kubernetes#kubernetes-upgrade-notes) for the version range you're passing through.
    - Check the `Site Admin > Updates` page to determine [upgrade readiness](/admin/updates/#upgrade-readiness).
 
-2. **Disable Connections to the Database**:
+2. **Scale down Connections to the Database**:
    - The following services must have their replicas scaled to 0:
      - Deployments (e.g., `kubectl scale deployment <name> --replicas=0`)
        - precise-code-intel-worker