Update ci

.github/workflows/ci.yml

@@ -63,7 +63,6 @@ jobs:
       - name: Configure poetry
         run: |
           poetry config virtualenvs.in-project true
-          poetry self add poetry-plugin-export
       - uses: actions/cache@v4
         id: cache
         with:
@@ -79,6 +78,7 @@ jobs:
         run: |
           if [[ "${{ steps.cache.outputs.cache-hit }}" == "true" ]]; then
             poetry run pip list
+            poetry run pip install --upgrade coverage  # Coverage may be downgraded by coveralls
             make _ci
           else
             make ci
@@ -98,7 +98,7 @@ jobs:
           PYTEST_ARGS: "-n auto --cov=tortoise --cov-append --tb=native -q"
       - name: Upload Coverage
         run: |
-          pip3 install --upgrade coveralls
+          pip install --upgrade coveralls
           coveralls --service=github
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}