Bump accountapp docker image version to 0.5.15

[jenkins-infra-updatecli]

Bump account-app docker image version

Update accountapp helm chart

key "$.image.tag" updated from "0.5.14" to "0.5.15", in file "charts/accountapp/values.yaml" key "$.version" updated from "0.8.22" to "0.8.23", in file "charts/accountapp/Chart.yaml"

0.5.15

Release published on the 2023-11-19 14:54:24 +0000 UTC at the url https://github.com/jenkins-infra/account-app/releases/tag/0.5.15

<!-- Optional: add a release summary here -->
## 📦 Dependency updates

* Update dependency com.icegreen:greenmail-junit5 to v2.0.1 (#329) @renovate

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