Bump codecov/codecov-action from 6 to 7 (#123)

Author: dependabot[bot]

.github/workflows/test.yml

@@ -21,7 +21,7 @@ jobs:
       - uses: julia-actions/julia-buildpkg@latest
       - uses: julia-actions/julia-runtest@latest
       - uses: julia-actions/julia-processcoverage@v1
-      - uses: codecov/codecov-action@v6
+      - uses: codecov/codecov-action@v7
         with:
           file: ./lcov.info
           token: ${{ secrets.CODECOV_TOKEN }}