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>

.github/workflows/testing.yml

@@ -150,7 +150,7 @@ jobs:
         sudo -E nox --force-color -e tests --no-venv -- -vv --system-service tests/
 
     - name: Upload coverage to Codecov
-      uses: codecov/codecov-action@v3
+      uses: codecov/codecov-action@v4
       with:
         token: ${{ secrets.CODECOV_TOKEN }}
         directory: artifacts/
@@ -161,7 +161,7 @@ jobs:
         verbose: true
 
     - name: Upload coverage to Codecov
-      uses: codecov/codecov-action@v3
+      uses: codecov/codecov-action@v4
       with:
         token: ${{ secrets.CODECOV_TOKEN }}
         directory: artifacts/
@@ -237,7 +237,7 @@ jobs:
         nox --force-color -e tests-${{ matrix.python-version }} -- -vv tests/
 
     - name: Upload coverage to Codecov
-      uses: codecov/codecov-action@v3
+      uses: codecov/codecov-action@v4
       with:
         token: ${{ secrets.CODECOV_TOKEN }}
         directory: artifacts/
@@ -248,7 +248,7 @@ jobs:
         verbose: true
 
     - name: Upload coverage to Codecov
-      uses: codecov/codecov-action@v3
+      uses: codecov/codecov-action@v4
       with:
         token: ${{ secrets.CODECOV_TOKEN }}
         directory: artifacts/
@@ -319,7 +319,7 @@ jobs:
         nox --force-color -e tests-${{ matrix.python-version }} -- -vv tests/
 
     - name: Upload coverage to Codecov
-      uses: codecov/codecov-action@v3
+      uses: codecov/codecov-action@v4
       with:
         token: ${{ secrets.CODECOV_TOKEN }}
         directory: artifacts/
@@ -330,7 +330,7 @@ jobs:
         verbose: true
 
     - name: Upload coverage to Codecov
-      uses: codecov/codecov-action@v3
+      uses: codecov/codecov-action@v4
       with:
         token: ${{ secrets.CODECOV_TOKEN }}
         directory: artifacts/
@@ -408,7 +408,7 @@ jobs:
         nox --force-color -e tests-${{ matrix.python-version }} -- -vv --sys-stats tests/
 
     - name: Upload coverage to Codecov
-      uses: codecov/codecov-action@v3
+      uses: codecov/codecov-action@v4
       with:
         token: ${{ secrets.CODECOV_TOKEN }}
         directory: artifacts/
@@ -419,7 +419,7 @@ jobs:
         verbose: true
 
     - name: Upload coverage to Codecov
-      uses: codecov/codecov-action@v3
+      uses: codecov/codecov-action@v4
       with:
         token: ${{ secrets.CODECOV_TOKEN }}
         directory: artifacts/