Update Umami image tag to latest version

[FUTC-Coding]

The umami repo lists the umami:postgres-latest image as deprecated with the new 3.0 release.

"If you are updating from Umami V2, image "postgresql-latest" is deprecated. You must change it to "latest". e.g., rename docker.umami.is/umami-software/umami:postgresql-latest to docker.umami.is/umami-software/umami:latest."

Changes

• Changed the umami image tag to umami:latest from the now deprecated umami:postgres-latest.

[ShadowArcanist]

Please pin to a static version rather than 'latest' to prevent the template from breaking due to upstream changes.

[github-actions]

Hi @FUTC-Coding! 👋

It appears to us that you are either adding a new service or making changes to an existing one.
We kindly ask you to also review and update the Coolify Documentation to include this new service or it's new configuration needs.
This will help ensure that our documentation remains accurate and up-to-date for all users.

Coolify Docs Repository: https://github.com/coollabsio/coolify-docs
How to Contribute a new Service to the Docs: https://coolify.io/docs/get-started/contribute/service#adding-a-new-service-template-to-the-coolify-documentation

[ShadowArcanist]

Hey @FUTC-Coding could you please bump the version to 3.0.2 since 3.0.1 is vulnerable to https://nextjs.org/blog/CVE-2025-66478

Ref - umami-software/umami#3829