Feature/remove obsolete version from docker compose files (#3543)

* Remove obsolete version

* Update changelog

CHANGELOG.md

@@ -12,6 +12,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Improved the allocations by ETF holding on the allocations page for the impersonation mode (experimental)
 - Improved the detection of REST APIs (`JSON`) used via the scraper configuration
 - Refactored the thresholds of the rules in the _X-ray_ section
+- Removed the obsolete `version` from the `docker-compose` files
 - Upgraded `Nx` from version `19.2.2` to `19.4.0`
 
 ## 2.92.0 - 2024-06-30

docker/docker-compose.build.yml

@@ -1,4 +1,3 @@
-version: '3.9'
 services:
   ghostfolio:
     build: ../

docker/docker-compose.dev.yml

@@ -1,4 +1,3 @@
-version: '3.9'
 services:
   postgres:
     image: postgres:15

docker/docker-compose.yml

@@ -1,4 +1,3 @@
-version: '3.9'
 services:
   ghostfolio:
     image: ghostfolio/ghostfolio:latest