Update ghcr.io/mastodon/mastodon Docker tag to v4.2.7 (#44)

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This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [ghcr.io/mastodon/mastodon](https://github.com/mastodon/mastodon) |
patch | `v4.2.6` -> `v4.2.7` |

---

### Release Notes

<details>
<summary>mastodon/mastodon (ghcr.io/mastodon/mastodon)</summary>

###
[`v4.2.7`](https://github.com/mastodon/mastodon/releases/tag/v4.2.7)

[Compare
Source](https://github.com/mastodon/mastodon/compare/v4.2.6...v4.2.7)

<h1><picture>
<source media="(prefers-color-scheme: dark)"
srcset="./lib/assets/wordmark.dark.png?raw=true">
<source media="(prefers-color-scheme: light)"
srcset="./lib/assets/wordmark.light.png?raw=true">
<img alt="Mastodon" src="./lib/assets/wordmark.light.png?raw=true"
height="34">
</picture></h1>

> \[!WARNING]
> **This release is an important security release fixing a major
security issue.**
>
> Corresponding security releases are available for the [4.1.x
branch](https://github.com/mastodon/mastodon/releases/tag/v4.1.15),
the [4.0.x
branch](https://github.com/mastodon/mastodon/releases/tag/v4.0.15) and
the [3.5.x
branch](https://github.com/mastodon/mastodon/releases/tag/v3.5.19).

> \[!NOTE]
> If you are using nightly builds, **do not use this release** but
update to `nightly.2024-02-17-security` or newer instead. If you are on
the `main` branch, update to the latest commit.

##### Changelog

##### Fixed

- Fix OmniAuth tests and edge cases in error handling
([ClearlyClaire](https://github.com/mastodon/mastodon/pull/29201),
[ClearlyClaire](https://github.com/mastodon/mastodon/pull/29207))
- Fix new installs by upgrading to the latest release of the `nsa` gem,
instead of a no longer existing commit
([mjankowski](https://github.com/mastodon/mastodon/pull/29065))

##### Security

- Fix insufficient checking of remote posts
([GHSA-jhrq-qvrm-qr36](https://github.com/mastodon/mastodon/security/advisories/GHSA-jhrq-qvrm-qr36))

##### Upgrade notes

To get the code for v4.2.7, use `git fetch && git checkout v4.2.7`.

> \[!NOTE]
> As always, **make sure you have backups of the database before
performing any upgrades**. If you are using docker-compose, this is how
a backup command might look: `docker exec mastodon_db_1 pg_dump -Fc -U
postgres postgres > name_of_the_backup.dump`

##### Dependencies

With the exception of Ruby's recommended version, external dependencies
have not changed since v4.2.0, the compatible Ruby, PostgreSQL, Node,
Elasticsearch and Redis versions are the same, that is:

-   Ruby: 3.0 to 3.2
-   PostgreSQL: 10 or newer
- Elasticsearch (recommended, for full-text search): 7.x (OpenSearch
should also work)
-   LibreTranslate (optional, for translations): 1.3.3 or newer
-   Redis: 4 or newer
-   Node: 16 or newer
-   ImageMagick: 6.9.7-7 or newer

> \[!TIP]
> If your uploaded images are broken after the upgrade, it means your
installed ImageMagick version is older than the new minimum version
(6.9.7-7), for example if you are running Ubuntu 18.04. If this happens,
you can find more information and ways to fix it [on this
page](https://github.com/mastodon/mastodon/issues/25776).

##### Update steps

The following instructions are for updating from 4.2.6.

If you are upgrading directly from an earlier release, please carefully
read the upgrade notes for the skipped releases as well, as they often
require extra steps such as database migrations.

**Non-Docker only:**

1. Install dependencies: `bundle install` and `yarn install
--frozen-lockfile`
2.  Restart all Mastodon processes

**Using Docker:**

1.  Restart all Mastodon processes

</details>

---

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charts/enoki-mastodon/Chart.yaml

@@ -7,7 +7,7 @@ type: application
 version: 0.3.11
 
 # renovate: image=ghcr.io/mastodon/mastodon
-appVersion: v4.2.6
+appVersion: v4.2.7
 
 dependencies:
   - name: mastodon

charts/mastodon/Chart.yaml

@@ -21,7 +21,7 @@ version: 4.0.11
 # incremented each time you make changes to the application. Versions are not expected to
 # follow Semantic Versioning. They should reflect the version the application is using.
 # renovate: image=ghcr.io/mastodon/mastodon
-appVersion: v4.2.6
+appVersion: v4.2.7
 
 dependencies:
 - name: common