build(deps): bump codecov/codecov-action from 3.1.4 to 4.6.0

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from 3.1.4 to 4.6.0.
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Changelog](https://github.com/codecov/codecov-action/blob/main/CHANGELOG.md)
- [Commits](codecov/codecov-action@eaaf4be...b9fd7d1)

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

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/ci-build.yml

@@ -70,7 +70,7 @@ jobs:
         run: nox -p ${{ matrix.python-version }} -s unit_tests -- --cov=datagateway_api --cov-report=xml
       - name: Upload unit test code coverage report
         if: matrix.python-version == '3.6'
-        uses: codecov/codecov-action@eaaf4bedf32dbdc6b720b63067d99c4d77d6047d # v3.1.4
+        uses: codecov/codecov-action@b9fd7d16f6d7d1b5d2bec1a2887e65ceed900238 # v4.6.0
 
       # ICAT Ansible clone and install dependencies
       - name: Checkout icat-ansible
@@ -155,7 +155,7 @@ jobs:
         run: nox -p ${{ matrix.python-version }} -s integration_tests -- --cov=datagateway_api --cov-report=xml
       - name: Upload integration test code coverage report
         if: matrix.python-version == '3.6'
-        uses: codecov/codecov-action@eaaf4bedf32dbdc6b720b63067d99c4d77d6047d # v3.1.4
+        uses: codecov/codecov-action@b9fd7d16f6d7d1b5d2bec1a2887e65ceed900238 # v4.6.0
 
   linting:
     runs-on: ubuntu-20.04