Limit CI to Ubuntu environment

Reduced CI workflow to only run on Ubuntu.

Author: DiogoRibeiro7

.github/workflows/ci.yml

@@ -68,7 +68,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest, macos-latest, windows-latest]
+        os: [ubuntu-latest]
         python-version: ['3.10', '3.11', '3.12']
     defaults:
       run: