Release notes for 1.51.1 (#3116)

* Release notes for 1.51.1

* Update astro/src/content/docs/release-notes/index.mdx

Co-authored-by: Brent Halsey <brent.halsey@fusionauth.io>

* added an item for the new healthcheck endpoint

* added a space to `healthcheck`

---------

Co-authored-by: Andy Pai <andy@fusionauth.io>
Co-authored-by: Brent Halsey <brent.halsey@fusionauth.io>

astro/src/content/docs/release-notes/index.mdx

@@ -17,6 +17,23 @@ import ReleaseNoteHeading from 'src/components/docs/release-notes/ReleaseNoteHea
 
 Looking for release notes older than 1.23.0? Look in the [release notes archive](/docs/release-notes/archive). Looking to be [notified of new releases?](/docs/operate/roadmap/releases#release-notifications) <span class="not-prose no-underline"><a class="ml-2" href="/docs/releases.xml"><i class="fas fa-xs fa-rss text-orange-700 text-2xl" width="50px" /></a></span>
 
+<ReleaseNoteHeading version='1.51.1' releaseDate='June 12, 2024' />
+### Fixed
+* An HTTP request sent to FusionAuth with non-ASCII characters in request header values is causing the connection to be closed without a response.
+  * Resolves [GitHub Issue #2774](https://github.com/FusionAuth/fusionauth-issues/issues/2774)
+* There is a misspelling in the description of the `user.password.reset.send` event on the tenant edit page.
+  * Resolves [GitHub Issue #2782](https://github.com/FusionAuth/fusionauth-issues/issues/2782)
+* The SCIM API is not properly handling reading, creating, and updating groups with more than one hundred memberships. Responses containing groups with more than one hundred memberships are only returning the first one hundred. Create and update operations are only creating or updating one hundred, and deleting the remainder.
+  * Resolves [GitHub Issue #2784](https://github.com/FusionAuth/fusionauth-issues/issues/2784)
+
+### New
+* A new `/api/health` endpoint has been added. Prior to this, the `/api/status` endpoint was the best option for performing health checks, but was too complicated for some health check scenarios. This new endpoint provides a binary indication of the healthiness or unhealthiness of a FusionAuth instance.
+  * Resolves [GitHub Issue #1166](https://github.com/FusionAuth/fusionauth-issues/issues/1166)
+
+### Internal
+Update 3rd party dependencies.
+* Upgrade io.fusionauth:java-http 0.3.4 to 0.3.5
+
 <ReleaseNoteHeading version='1.51.0' releaseDate='May 28, 2024' name="Theming Toucan" />
 ### Fixed
 * In version `1.45.0` we added a hosted OAuth backend capability, allowing a developer to write a front end-only application, but still take advantage of an authorization code grant workflow by leveraging the backend provided by FusionAuth. Multi-segment domain suffixes (e.g. `.co.uk`) are not handled correctly by this hosted backend when setting the domain on cookies. Cookie domains are now set properly.
@@ -40,6 +57,7 @@ Looking for release notes older than 1.23.0? Look in the [release notes archive]
   * Upgrade `org.graalvm.js:js` `22.3.3` to `23.0.3`
   * Upgrade `io.fusionauth:java-http` `0.3.2` to `0.3.4`
   * Resolves [GitHub Issue #2727](https://github.com/FusionAuth/fusionauth-issues/issues/2727)
+
 <ReleaseNoteHeading version='1.50.1' releaseDate='April 25, 2024' />
 
 ### Fixed