Move linting to a separate job

`check-manifest` does not work on PyPy on Windows

Linting rules are redundant if checked more than once

Author: HexDecimal

.github/workflows/test.yml

@@ -7,6 +7,15 @@ on:
   pull_request:
 
 jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install Tox
+        run: pip install tox
+      - name: Lint with tox
+        run: tox run -e lint
+
   tests:
     runs-on: ${{ matrix.os }}
     strategy:
@@ -22,10 +31,9 @@ jobs:
         python-version: ${{ matrix.python-version }}
     - name: Install dependencies
       run: |
-        python -m pip install --upgrade pip
         pip install tox
     - name: Test with tox
-      run: tox run -e py,report_ci,lint
+      run: tox run -e py,report_ci
     - uses: codecov/codecov-action@v4
       with:
         token: ${{ secrets.CODECOV_TOKEN }}