chore(helm): update image docker.io/bitnamisecure/memcached digest to 4f662a4 (#39761)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| docker.io/bitnamisecure/memcached | digest | `928b52a` -> `4f662a4` |

---

> [!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:eyJjcmVhdGVkSW5WZXIiOiI0MS44Mi4xMCIsInVwZGF0ZWRJblZlciI6IjQxLjgyLjEwIiwidGFyZ2V0QnJhbmNoIjoibWFzdGVyIiwibGFiZWxzIjpbImF1dG9tZXJnZSIsInJlbm92YXRlL2NvbnRhaW5lciIsInR5cGUvZGlnZXN0Il19-->

charts/stable/memcached/Chart.yaml

@@ -37,5 +37,5 @@ sources:
   - https://github.com/truecharts/charts/tree/master/charts/stable/memcached
   - https://hub.docker.com/r/bitnamisecure/memcached
 type: application
-version: 16.6.0
+version: 16.6.1
 

charts/stable/memcached/values.yaml

@@ -1,7 +1,7 @@
 image:
   repository: docker.io/bitnamisecure/memcached
   pullPolicy: IfNotPresent
-  tag: latest@sha256:928b52a9a3afe56a0056fa0398f9765c140bcacea0723efb06a83daac9b813fc
+  tag: latest@sha256:4f662a43dfc1174acfc1e68b44f9aee4b398f91fd675029b7785292c9482e17f
 
 service:
   main: