chore(deps): update container image ghcr.io/ix-ai/smtp to v0.5.2@278b25c by renovate (#22874)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| ghcr.io/ix-ai/smtp | digest | `d5a0322` -> `278b25c` |

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This PR has been generated by [Renovate
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<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzNy4zOTEuMCIsInVwZGF0ZWRJblZlciI6IjM3LjM5MS4wIiwidGFyZ2V0QnJhbmNoIjoibWFzdGVyIiwibGFiZWxzIjpbImF1dG9tZXJnZSIsInVwZGF0ZS9kb2NrZXIvZ2VuZXJhbC9ub24tbWFqb3IiXX0=-->

charts/stable/smtp-relay/Chart.yaml

@@ -34,4 +34,4 @@ sources:
   - https://github.com/ix-ai/smtp
   - https://github.com/truecharts/charts/tree/master/charts/stable/smtp-relay
 type: application
-version: 5.0.0
+version: 5.0.1

charts/stable/smtp-relay/values.yaml

@@ -1,7 +1,7 @@
 image:
   repository: ghcr.io/ix-ai/smtp
   pullPolicy: IfNotPresent
-  tag: v0.5.2@sha256:d5a0322d770807dec978dff962a8dea63ba95d13562eac0590715a8079b5b333
+  tag: v0.5.2@sha256:278b25c14b76a82283a2afc44f1c69e314578d685edd78d4848aacbc26cd67d9
 
 securityContext:
   container: