Update Helm release loki to v6.48.0 (#2354)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [loki](https://grafana.github.io/helm-charts) ([source](https://github.com/grafana/helm-charts)) | minor | `6.46.0` -> `6.48.0` |

---

### Configuration

📅 **Schedule**: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied.

♻ **Rebasing**: Whenever PR is behind base branch, or you tick the rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about this update again.

---

 - [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check this box

---

This PR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate).
<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiI0Mi4zOS4xIiwidXBkYXRlZEluVmVyIjoiNDIuMzkuMSIsInRhcmdldEJyYW5jaCI6Im1haW4iLCJsYWJlbHMiOlsiY2hhcnQiXX0=-->

Reviewed-on: #2354
Co-authored-by: Renovate Bot <renovate-bot@alexlebens.net>
Co-committed-by: Renovate Bot <renovate-bot@alexlebens.net>

clusters/cl01tl/helm/loki/Chart.lock

@@ -1,9 +1,9 @@
 dependencies:
 - name: loki
   repository: https://grafana.github.io/helm-charts
-  version: 6.46.0
+  version: 6.48.0
 - name: promtail
   repository: https://grafana.github.io/helm-charts
   version: 6.17.1
-digest: sha256:ff5441b35309842526f15b544bf3a7cb80508b1547bbd0eb58fa584172b716be
-generated: "2025-12-01T19:55:56.473483-06:00"
+digest: sha256:218f6fdff5df62e43f081f045ab7ccba541a792b42750e3ebb8ac28308072724
+generated: "2025-12-10T18:02:17.566041524Z"

clusters/cl01tl/helm/loki/Chart.yaml

@@ -16,7 +16,7 @@ maintainers:
   - name: alexlebens
 dependencies:
   - name: loki
-    version: 6.46.0
+    version: 6.48.0
     repository: https://grafana.github.io/helm-charts
   - name: promtail
     version: 6.17.1