fix(ci): remove matrix

.github/workflows/ci.yaml

@@ -4,24 +4,18 @@ on:
 
 jobs:
   ci:
-    strategy:
-      fail-fast: false
-      matrix:
-        python-version: ["3.11"]
-        poetry-version: ["1.8.2"]
-        os: [ubuntu-22.04]
-    runs-on: ${{ matrix.os }}
+    runs-on: ubuntu-latest
     steps:
       - name: Checkout
         uses: actions/checkout@v4
       - name: Install Python
         uses: actions/setup-python@v4
         with:
-          python-version: ${{ matrix.python-version }}
+          python-version: "3.11"
       - name: Install poetry
         uses: abatilo/actions-poetry@v2
         with:
-          poetry-version: ${{ matrix.poetry-version }}
+          poetry-version: "1.8.2"
       - name: Install dev dependencies (lint)
         run: poetry install -v --no-interaction --no-root --only dev
       - name: Run linting