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/Downstream.yml

@@ -62,7 +62,7 @@ jobs:
             exit(0)  # Exit immediately, as a success
           end
       - uses: julia-actions/julia-processcoverage@v1
-      - uses: codecov/codecov-action@v5
+      - uses: codecov/codecov-action@v6
         with:
           files: lcov.info
           token: ${{ secrets.CODECOV_TOKEN }}

.github/workflows/GPU.yml

@@ -31,7 +31,7 @@ jobs:
         env:
           GROUP: "GPU"
       - uses: julia-actions/julia-processcoverage@v1
-      - uses: codecov/codecov-action@v5
+      - uses: codecov/codecov-action@v6
         with:
           files: lcov.info
           token: ${{ secrets.CODECOV_TOKEN }}

.github/workflows/Tests.yml

@@ -62,7 +62,7 @@ jobs:
       - uses: julia-actions/julia-processcoverage@v1
         with:
           directories: "src,ext"
-      - uses: codecov/codecov-action@v5
+      - uses: codecov/codecov-action@v6
         if: "${{ github.event.pull_request.head.repo.full_name == github.repository }}"
         with:
           files: lcov.info