docs: release notes for 0.12.10 (#786)

Co-authored-by: Justin Chen <[email protected]>

docs/release-notes.txt

@@ -6,6 +6,45 @@ Release Notes
 Version 0.12
 ------------
 
+Version 0.12.10
+^^^^^^^^^^^^^^^
+
+**Release Date:** June 26, 2020
+
+**Improvements**
+
+- WebUI: Add a dedicated page for master logs at ``/det/logs``.
+
+- WebUI: Provide a Swagger UI for exploring the Determined REST API. This can be accessed via the API link on the WebUI.
+
+- WebUI: Default the Experiments view list length to 25 entries. More entries can be shown as needed.
+
+- WebUI: Improve detection of situations where the WebUI version doesn't match the master version as a result of browser caching.
+
+- CLI: Improve performance when retrieving trial logs.
+
+- CLI: Add the ``det user rename`` command for administrators to change the username of existing users.
+
+- Expand :ref:`use-trained-models` by including checkpoint metadata management.
+
+- Reorganize examples by splitting :ref:`model-definitions_native-api` and :ref:`model-definitions_trial-api` examples into separate folders.
+
+**Bug Fixes**
+
+- Allow ``det-deploy local agent-up`` to work with remote masters.
+
+- Ensure network failures during checkpoint upload do not unrecoverably break the associated trial.
+
+- Ensure ``shared_fs`` is usable for non-root containers for some ``host_path`` values.
+
+- Fix a timeout issue that affected large (40+ machines) distributed experiments.
+
+- Ensure the CLI can make secure connections to the master.
+
+- Fix an issue that affected multi-GPU in ``PyTorchTrial`` with mixed precision enabled.
+
+- Add a timeout to trial containers to ensure they are terminated promptly.
+
 Version 0.12.7
 ^^^^^^^^^^^^^^