chore(memcached): update image docker.io/bitnamisecure/memcached digest to 8040a22 (#49973)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| docker.io/bitnamisecure/memcached | digest | `19fe9b9` → `8040a22` |

---

> [!WARNING]
> Some dependencies could not be looked up. Check the [Dependency
Dashboard](../issues/18710) for more information.

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

---

### Configuration

📅 **Schedule**: (UTC)

- 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:eyJjcmVhdGVkSW5WZXIiOiI0My4xMzAuMSIsInVwZGF0ZWRJblZlciI6IjQzLjEzMC4xIiwidGFyZ2V0QnJhbmNoIjoibWFzdGVyIiwibGFiZWxzIjpbImFwcC9tZW1jYWNoZWQiLCJhdXRvbWVyZ2UiLCJyZW5vdmF0ZS9jb250YWluZXIiLCJ0eXBlL2RpZ2VzdCJdfQ==-->

charts/stable/memcached/Chart.yaml

@@ -37,5 +37,5 @@ sources:
   - https://github.com/trueforge-org/truecharts/tree/master/charts/stable/memcached
   - https://hub.docker.com/r/bitnamisecure/memcached
 type: application
-version: 17.6.3
+version: 17.6.4
 

charts/stable/memcached/values.yaml

@@ -2,7 +2,7 @@
 image:
   repository: docker.io/bitnamisecure/memcached
   pullPolicy: IfNotPresent
-  tag: latest@sha256:19fe9b9387fa678418979b58c3924d54762a2a91f65f027d6daf531dc800091f
+  tag: latest@sha256:8040a22d6a3422e37be798dae14710a9f51bff5cbf0515c5a828e5f709b40ff4
 
 service:
   main: