Merge pull request #6997 from cylc/prepare-8.5.4

Prepare release: 8.5.4

Author: MetRonnie

CHANGES.md

@@ -11,6 +11,14 @@ $ towncrier create <PR-number>.<break|feat|fix>.md --content "Short description"
 
 <!-- towncrier release notes start -->
 
+## __cylc-8.5.4 (Released 2025-09-19)__
+
+### 🔧 Fixes
+
+[#6817](https://github.com/cylc/cylc-flow/pull/6817) - Fixes two rare bugs associated with reloading the workflow configuration after removing tasks or xtriggers.
+
+[#6990](https://github.com/cylc/cylc-flow/pull/6990) - Fix a bug where setting 'batch system' and not setting host could lead to the wrong platform being selected.
+
 ## __cylc-8.5.3 (Released 2025-09-09)__
 
 ### 🔧 Fixes

changes.d/6817.fix.md

@@ -53,7 +53,7 @@ def environ_init():
 
 environ_init()
 
-__version__ = '8.5.4.dev'
+__version__ = '8.5.4'
 
 
 def iter_entry_points(entry_point_name):