Bump codecov/codecov-action from 5 to 6

Bumps [codecov/codecov-action](https://github.com/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](codecov/codecov-action@v5...v6)

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

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

Author: dependabot[bot]

.github/workflows/merge-pytest.yml

@@ -63,7 +63,7 @@ jobs:
           coverage xml
       - name: Send coverage results
         if: success()
-        uses: codecov/codecov-action@v5
+        uses: codecov/codecov-action@v6
         env:
           CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
 
@@ -97,7 +97,7 @@ jobs:
         pytest --cov pynetdicom --ignore=pynetdicom/apps -n auto
     - name: Send coverage results
       if: success()
-      uses: codecov/codecov-action@v5
+      uses: codecov/codecov-action@v6
       env:
         CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
 
@@ -129,6 +129,6 @@ jobs:
         pytest --cov pynetdicom --ignore=pynetdicom/apps -n auto
     - name: Send coverage results
       if: success()
-      uses: codecov/codecov-action@v5
+      uses: codecov/codecov-action@v6
       env:
         CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}

.github/workflows/pr-pytest.yml

@@ -68,7 +68,7 @@ jobs:
           pytest -x --cov pynetdicom --ignore=pynetdicom/apps -n 0 -m "serial"
       - name: Send coverage results
         if: ${{ success() }}
-        uses: codecov/codecov-action@v5
+        uses: codecov/codecov-action@v6
 
   pydicom-dev:
     # Matrix builds with development pydicom
@@ -100,7 +100,7 @@ jobs:
         pytest -x --cov pynetdicom --ignore=pynetdicom/apps -n auto
     - name: Send coverage results
       if: ${{ success() }}
-      uses: codecov/codecov-action@v5
+      uses: codecov/codecov-action@v6
 
   pydicom-release:
     # Matrix builds with released pydicom
@@ -133,4 +133,4 @@ jobs:
         pytest -x --cov pynetdicom --ignore=pynetdicom/apps -n auto
     - name: Send coverage results
       if: ${{ success() }}
-      uses: codecov/codecov-action@v5
+      uses: codecov/codecov-action@v6