[staging] Update Rook Ceph group to v1.13.7 (patch) (#3243)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [rook-ceph](https://togithub.com/rook/rook) | patch | `v1.13.6` ->
`v1.13.7` |
| [rook-ceph-cluster](https://togithub.com/rook/rook) | patch |
`v1.13.6` -> `v1.13.7` |

---

### Release Notes

<details>
<summary>rook/rook (rook-ceph)</summary>

### [`v1.13.7`](https://togithub.com/rook/rook/releases/tag/v1.13.7)

[Compare
Source](https://togithub.com/rook/rook/compare/v1.13.6...v1.13.7)

##### Improvements

Rook v1.13.7 is a patch release limited in scope and focusing on feature
additions and bug fixes to the Ceph operator.

- core: Set default ceph version to v18.2.2
([#&#8203;13913](https://togithub.com/rook/rook/issues/13913),
[@&#8203;travisn](https://togithub.com/travisn))
- monitoring: Increase default metrics scraping interval from 5s to 10s
([#&#8203;13923](https://togithub.com/rook/rook/issues/13923),
[@&#8203;rkachach](https://togithub.com/rkachach))
- exporter: Apply labels from `monitoring` section of CephCluster to
ceph-exporter
([#&#8203;13902](https://togithub.com/rook/rook/issues/13902),
[@&#8203;rkachach](https://togithub.com/rkachach))

</details>

---

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---

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---

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kubernetes/staging/apps/rook-ceph/rook-ceph/cluster/helm-release.yaml

@@ -9,7 +9,7 @@ spec:
   chart:
     spec:
       chart: rook-ceph-cluster
-      version: v1.13.6
+      version: v1.13.7
       sourceRef:
         kind: HelmRepository
         name: rook-ceph-charts

kubernetes/staging/apps/rook-ceph/rook-ceph/operator/helm-release.yaml

@@ -10,7 +10,7 @@ spec:
   chart:
     spec:
       chart: rook-ceph
-      version: v1.13.6
+      version: v1.13.7
       sourceRef:
         kind: HelmRepository
         name: rook-ceph-charts