Add changelog entry for #5911

Author: greenape

CHANGELOG.md

@@ -9,6 +9,9 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 ### Added
 
 ### Changed
+- Flowmachine's cache cleanup service is now a separate docker container from the main server. [#5911](https://github.com/Flowminder/FlowKit/issues/5911)
+> [!WARNING]
+> You will need to update your FlowKit deployment to include an additional flowmachine container which sets the command to `"cache-cleanup"`.
 
 ### Fixed
 

docs/source/administrator/deployment.md

@@ -118,7 +118,7 @@ We recommend running FlowETL using the celery scheduler, in which case you will
     Generating Fernet keys
 
     A convenient way to generate Fernet keys is to use the python [cryptography](https://cryptography.io/) package. After installing, you can generate a new key by running `python -c "from cryptography.fernet import Fernet;print(Fernet.generate_key().decode())"`.
-
+=
 
 See also the [airflow documentation](https://airflow.apache.org/docs/stable/) for other configuration options which you can provide as environment variables.