docs: Add release notes for 2.14.0 (#6153)

Co-authored-by: robot-ci-heartex <[email protected]>
Co-authored-by: caitlinwheeless <[email protected]>

docs/source/guide/release_notes/onprem/2.14.0.md

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+## Label Studio Enterprise 2.14.0
+
+<div class="onprem-highlight">Refreshed interface for the HumanSignal platform and bug fixes</div>
+
+*Jul 30, 2024*
+
+Helm Chart version: 1.6.0
+
+### New features
+
+#### Refreshed Label Studio interface
+
+This release includes a new UI with updated colors and fonts, giving it a sleek new look while maintaining the same intuitive navigation you're familiar with. All Label Studio tools, features, and settings are still in the same place, ensuring a smooth transition.
+
+![Screenshot of new UI](/images/releases/2-14-UI-login.png)
+
+![Screenshot of new UI](/images/releases/2-14-UI-new.png)
+
+![Screenshot of new UI](/images/releases/2-14-UI-projects.png)
+
+![Screenshot of new UI](/images/releases/2-14-UI-settings.png)
+
+![Screenshot of new UI](/images/releases/2-14-UI-settings2.png)
+
+### Bug fixes
+
+- Fixed an issue where users were unable to export in Pascal VOC XML format when applying bounding boxes to images.
+
+- Fixed an issue where after an annotation had been fixed and accepted, the update action was not recorded when exporting the annotation history to JSON.
+
+- Fixed a sizing issue affecting the icons for workspace actions.
+
+- Fixed an issue where the docs link icon was not properly formatted.
+
+- Fixed an issue affecting SAML users caused by changes to the HumanSignal app domain.
+
+- Fixed an issue in which sometimes the Submit button would be displayed when it should be the Update button.
+
+- Fixed an issue where Annotators where able to resolve comments made by Reviewers, when this action should not be available to them.
+
+- Fixed an issue where usernames in the Annotator Performance Report were not displayed correctly if the user had a long email address.
+
+- Fixed an issue where annotation history was not working correctly if `created_by` was null.
+