docs: Add release notes for 2.20.0 (#6988)

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

Author: robot-ci-heartex

docs/source/guide/release_notes/onprem/2.20.0.md

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+## Label Studio Enterprise 2.20.0
+
+<div class="onprem-highlight">Taxonomy for labeling, new audio hotkey, performance improvements, bug fixes </div>
+
+*Jan 28, 2025*
+
+Helm Chart version: 1.9.0
+
+### Enhancements
+
+#### Use Taxonomy for labeling
+
+There is a new `labeling` parameter available for the Taxonomy tag. When set to true, you can apply your Taxonomy classes to different regions in text. For more information, see [Taxonomy as a labeling tool](/templates/taxonomy).
+
+![Screenshot of taxonomy as labeling tool](/images/releases/2-20-taxonomy.png)
+
+#### Hotkeys for audio labeling
+
+There is a new hotkey available for pausing and starting audio: `ctrl`+`p` (Windows) or `command`+`p` (Mac). This is in addition to the space hotkey that performs the same function. However, this new hotkey is useful when you are working with audio and have a text area field in focus.
+
+#### Video frame classification template
+
+The video frame classification template is now available in the Label Studio app as well as [the documentation](/templates/video_frame_classification).
+
+
+#### Performance improvements
+
+Optimized the API calls made from the frontend within the members management and Data Manager users lists. Also optimized the Projects page for faster load times. 
+
+### Security
+
+- Upgraded pyarrow to address vulnerabilities in older packages.
+
+- Updated the default settings for CSRF cookie to be more secure and added an environment setting to control cookie age.
+
+
+### Bug fixes
+
+- Fixed an issue where the Label Studio version as displayed in the side menu was not formatted properly.
+  
+- Fixed an issue where the `contextlog` was not reporting the `content_type`.
+
+- Fixed an issue with overlapping relations on the overlay on highlighting.
+
+- Fixed an issue where task IDs were being duplicated when importing a large number of tasks through the API.
+
+- Fixed an issue where users were not being redirected to the appropriate page after logging in.
+
+- Fixed an issue where users were unable to edit meta information that they previously added to bounding box regions.
+
+- Fixed multiple issues resulting from Poetry/Poetry core 2 release.
+
+- Fixed an issue where the django-rq admin page was unavailable.
+
+- Fixed a possible race condition when dynamically loading the Data Manager or editor that would prevent either from loading.
+
+- Fixed an issue where skipped tasks were not being calculated as completed when the project Skip Queue setting was set to **Ignore Skipped**.
+
+