chore(deps): update container image ghcr.io/ix-ai/smtp to v0.5.2@4d03169 by renovate (#23547)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| ghcr.io/ix-ai/smtp | digest | `c65a266` -> `4d03169` |

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> Some dependencies could not be looked up. Check the Dependency
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This PR has been generated by [Renovate
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charts/stable/smtp-relay/Chart.yaml

@@ -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: 5.1.1
+version: 5.1.2

charts/stable/smtp-relay/values.yaml

@@ -1,7 +1,7 @@
 image:
   repository: ghcr.io/ix-ai/smtp
   pullPolicy: IfNotPresent
-  tag: v0.5.2@sha256:c65a266793600b31ae7a50c77c3bbf0aa619e58acbc159fe9cd7032782028b3c
+  tag: v0.5.2@sha256:4d03169e660cfe733ea6a7314665145d8b6bb8a1c033c0232a9e0f88952e7b92
 
 securityContext:
   container: