chore(container): update oci-image ghcr.io/ix-ai/smtp to by renovate (#27865)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [ghcr.io/ix-ai/smtp](https://gitlab.com/ix.ai/smtp) | patch |
`2e668f4` -> `17b59e7` |

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### Release Notes

<details>
<summary>ix.ai/smtp (ghcr.io/ix-ai/smtp)</summary>

### [`v0.5.7`](https://gitlab.com/ix.ai/smtp/tags/v0.5.7)

[Compare Source](https://gitlab.com/ix.ai/smtp/compare/v0.5.6...v0.5.7)

#### Release v0.5.7
 
* 9815d3a Update debian:stable-slim Docker digest to fffe160
* fd5b824 Update registry.gitlab.com/ix.ai/smtp Docker digest to 2e668f4

</details>

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This PR has been generated by [Renovate
Bot](https://redirect.github.com/renovatebot/renovate).

<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzOC4xMjQuNCIsInVwZGF0ZWRJblZlciI6IjM4LjEyNC40IiwidGFyZ2V0QnJhbmNoIjoibWFzdGVyIiwibGFiZWxzIjpbImF1dG9tZXJnZSIsInJlbm92YXRlL2NvbnRhaW5lciIsInR5cGUvcGF0Y2giXX0=-->

charts/stable/smtp-relay/Chart.yaml

@@ -6,7 +6,7 @@ annotations:
   truecharts.org/min_helm_version: "3.11"
   truecharts.org/train: stable
 apiVersion: v2
-appVersion: 0.5.6
+appVersion: 0.5.7
 dependencies:
   - name: common
     version: 25.0.0
@@ -33,4 +33,4 @@ sources:
   - https://github.com/ix-ai/smtp
   - https://github.com/truecharts/charts/tree/master/charts/stable/smtp-relay
 type: application
-version: 5.2.1
+version: 5.2.2

charts/stable/smtp-relay/values.yaml

@@ -1,7 +1,7 @@
 image:
   repository: ghcr.io/ix-ai/smtp
   pullPolicy: IfNotPresent
-  tag: v0.5.6@sha256:2e668f4b254865c8c02a8ccfcf88b4b2d65a96fbcc4e1b45ca7e83ca26acc9fc
+  tag: v0.5.7@sha256:17b59e7b32aa9762d9f035fbc01712f958384cfb82a58848609218424788c0c6
 
 securityContext:
   container: