build(deps): bump codecov/codecov-action in the actions group

Bumps the actions group with 1 update: [codecov/codecov-action](https://github.com/codecov/codecov-action).


Updates `codecov/codecov-action` from 5 to 6
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Changelog](https://github.com/codecov/codecov-action/blob/main/CHANGELOG.md)
- [Commits](https://github.com/codecov/codecov-action/compare/v5...v6)

---
updated-dependencies:
- dependency-name: codecov/codecov-action
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: actions
...

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

.github/workflows/ci.yml

@@ -351,7 +351,7 @@ jobs:
 
     - name: Upload test results to Codecov
       if: ${{ !cancelled() && !contains(matrix.toxenv, 'mypy') && !contains(matrix.toxenv, 'docs') }}
-      uses: codecov/codecov-action@v5
+      uses: codecov/codecov-action@v6
       env:
         OS: ${{ runner.os }}
         python: ${{ matrix.python-version }}
@@ -363,7 +363,7 @@ jobs:
 
     - name: Upload coverage to Codecov
       if: ${{ !cancelled() && !contains(matrix.toxenv, 'mypy') && !contains(matrix.toxenv, 'docs') }}
-      uses: codecov/codecov-action@v5
+      uses: codecov/codecov-action@v6
       env:
         OS: ${{ runner.os }}
         python: ${{ matrix.python-version }}
@@ -597,7 +597,7 @@ jobs:
 
       - name: Upload test results to Codecov
         if: ${{ !cancelled() }}
-        uses: codecov/codecov-action@v5
+        uses: codecov/codecov-action@v6
         env:
           OS: ${{ matrix.os }}
         with:
@@ -608,7 +608,7 @@ jobs:
 
       - name: Upload coverage to Codecov
         if: ${{ !cancelled() }}
-        uses: codecov/codecov-action@v5
+        uses: codecov/codecov-action@v6
         env:
           OS: ${{ matrix.os }}
         with:
@@ -680,7 +680,7 @@ jobs:
 
       - name: Upload test results to Codecov
         if: ${{ !cancelled() }}
-        uses: codecov/codecov-action@v5
+        uses: codecov/codecov-action@v6
         env:
           OS: ${{ runner.os }}
           python: '3.11'
@@ -692,7 +692,7 @@ jobs:
 
       - name: Upload coverage to Codecov
         if: ${{ !cancelled() }}
-        uses: codecov/codecov-action@v5
+        uses: codecov/codecov-action@v6
         env:
           OS: ${{ runner.os }}
           python: '3.11'