chore(helm): update image ghcr.io/ix-ai/smtp v0.7.3 → v0.7.4 (#32388)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [ghcr.io/ix-ai/smtp](https://gitlab.com/ix.ai/smtp) | patch |
`3197e36` -> `a4a08d1` |

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### Release Notes

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

### [`v0.7.4`](https://gitlab.com/ix.ai/smtp/tags/v0.7.4)

[Compare Source](https://gitlab.com/ix.ai/smtp/compare/v0.7.3...v0.7.4)

#### Release v0.7.4
 
* d314470 Switch from docker.io to ecr.aws

</details>

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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: 0.7.3
+appVersion: 0.7.4
 dependencies:
   - name: common
     version: 25.4.10
@@ -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: 5.7.3
+version: 5.7.4

charts/stable/smtp-relay/values.yaml

@@ -1,7 +1,7 @@
 image:
   repository: ghcr.io/ix-ai/smtp
   pullPolicy: IfNotPresent
-  tag: v0.7.3@sha256:3197e36d50419ca5fa8d00cd1ef35909dbe0a4f817799901135a41736233128e
+  tag: v0.7.4@sha256:a4a08d127eb269b251521f185c14f755f3df496fb1bf3bac8b98ede23b2b52f3
 
 securityContext:
   container: