Bump codecov/codecov-action from v1.0.7 to v1.0.15 (#58)

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from v1.0.7 to v1.0.15.
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Commits](codecov/codecov-action@v1.0.7...239febf)

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/test.yml

@@ -16,6 +16,6 @@ jobs:
       - run: make build
       - run: |
           go test ./... -mod=readonly -timeout 8m -race -coverprofile=coverage.txt -covermode=atomic
-      - uses: codecov/codecov-action@v1.0.7
+      - uses: codecov/codecov-action@v1.0.15
         with:
           file: ./coverage.txt