v2.1.5

This release focuses on enhancing email functionality, including improved error logging, the addition of plain text emails, and the removal of trial and billing-related messaging in the Community Edition.

## Upgrade

Update the image used for `plausible`

<sub><kbd>compose.yml</kbd></sub>
```diff
plausible:
- image: ghcr.io/plausible/community-edition:v2.1.4
+ image: ghcr.io/plausible/community-edition:v2.1.5
```

and restart the containers

<sub><kbd>console</kbd></sub>
```console
$ docker compose up -d
```

This will boot up the new version of the app.

## Changelog

Following [changes](https://github.com/plausible/analytics/compare/v2.1.4...v2.1.5) have been made since v2.1.4:

### Added

- Add text version to emails https://github.com/plausible/analytics/pull/4674
- Add error logging when email delivery fails https://github.com/plausible/analytics/pull/4885

### Removed

- Remove Plausible Cloud contacts https://github.com/plausible/analytics/pull/4766
- Remove trial mentions https://github.com/plausible/analytics/pull/4668
- Remove billings and upgrade tabs from settings https://github.com/plausible/analytics/pull/4897