chore(helm): update image public.ecr.aws/bitnami/mongodb digest to c7cbade (#34112)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
|
[public.ecr.aws/bitnami/mongodb](https://redirect.github.com/bitnami/containers)
([source](https://redirect.github.com/bitnami/containers/tree/HEAD/bitnami/mongodb))
| digest | `f4efb32` -> `c7cbade` |

---

> [!WARNING]
> Some dependencies could not be looked up. Check the Dependency
Dashboard for more information.

Add the preset `:preserveSemverRanges` to your config if you don't want
to pin your dependencies.

---

### Configuration

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

🚦 **Automerge**: Enabled.

♻ **Rebasing**: Whenever PR becomes conflicted, 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://redirect.github.com/renovatebot/renovate).

<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzOS4yMzQuMCIsInVwZGF0ZWRJblZlciI6IjM5LjIzNC4wIiwidGFyZ2V0QnJhbmNoIjoibWFzdGVyIiwibGFiZWxzIjpbImF1dG9tZXJnZSIsInJlbm92YXRlL2NvbnRhaW5lciIsInR5cGUvZGlnZXN0Il19-->

charts/stable/mongodb/Chart.yaml

@@ -38,4 +38,5 @@ sources:
   - https://github.com/truecharts/charts/tree/master/charts/stable/mongodb
   - https://www.mongodb.com
 type: application
-version: 15.3.8
+version: 15.3.9
+

charts/stable/mongodb/values.yaml

@@ -1,7 +1,7 @@
 image:
   repository: public.ecr.aws/bitnami/mongodb
   pullPolicy: IfNotPresent
-  tag: 8.0.6@sha256:f4efb32ecbaed778068ec8a9f29df899b950153f248aa0034ef9c17445c00c96
+  tag: 8.0.6@sha256:c7cbadeb3c01e96eb1858eae3dfb3dc3e7c2ead5969a5f4b47271fcca92f278d
 
 includeCommon: true
 workload: