chore: simplify format to run only in one version

.github/workflows/checks.yml

@@ -7,32 +7,6 @@ on:
   merge_group:
 
 jobs:
-  format:
-    runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        lib:
-          - scaleway-core
-          - scaleway
-          - scaleway-async
-        python-version: ['3.10' ,'3.11', '3.12', '3.13']
-    defaults:
-      run:
-        working-directory: ${{ matrix.lib }}
-    steps:
-      - uses: actions/checkout@v4
-      - name: Install poetry
-        run: pipx install poetry
-      - name: Set up Python
-        uses: actions/setup-python@v5
-        with:
-          python-version: ${{ matrix.python-version }}
-          cache: "poetry"
-      - name: Install dependencies and library
-        run: poetry install
-      - name: Check format
-        run: poetry run ruff format --check
-
   typing:
     runs-on: ubuntu-latest
     strategy:

.github/workflows/format.yml

@@ -0,0 +1,33 @@
+name: format
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+  merge_group:
+
+jobs:
+  format:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        lib:
+          - scaleway-core
+          - scaleway
+          - scaleway-async
+    defaults:
+      run:
+        working-directory: ${{ matrix.lib }}
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install poetry
+        run: pipx install poetry
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.13'
+          cache: "poetry"
+      - name: Install dependencies and library
+        run: poetry install
+      - name: Check format
+        run: poetry run ruff format --check