Bump codecov/codecov-action from 3 to 4

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from 3 to 4.
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Changelog](https://github.com/codecov/codecov-action/blob/main/CHANGELOG.md)
- [Commits](codecov/codecov-action@v3...v4)

---
updated-dependencies:
- dependency-name: codecov/codecov-action
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -76,7 +76,7 @@ jobs:
           python-version: ${{ matrix.python-version }}
       - run: python -m pip install -e '.[test]'
       - run: python -m pytest
-      - uses: codecov/codecov-action@v3
+      - uses: codecov/codecov-action@v4
         with:
           flags: ${{ matrix.python-version }}
 
@@ -96,7 +96,7 @@ jobs:
           python-version: ${{ matrix.python-version }}
       - run: python -m pip install -e ".[test,${{ matrix.extras }}]"
       - run: python -m pytest
-      - uses: codecov/codecov-action@v3
+      - uses: codecov/codecov-action@v4
         with:
           flags: ${{ matrix.extras }}
 
@@ -127,7 +127,7 @@ jobs:
         env:
           DB_PORT: ${{ job.services.postgres.ports[5432] }}
           DB: pg
-      - uses: codecov/codecov-action@v3
+      - uses: codecov/codecov-action@v4
         with:
           flags: ${{ matrix.extras }}