ci: run only on ubuntu

Author: aspeddro

.github/workflows/ci.yml

@@ -22,11 +22,7 @@ concurrency:
 
 jobs:
   test:
-    runs-on: ${{matrix.os}}
-    strategy:
-      fail-fast: false
-      matrix:
-        os: [ubuntu-latest, windows-latest, macos-14]
+    runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4