Bump codecov/codecov-action from 2.1.0 to 3 (sigstore#505)

* Bump codecov/codecov-action from 2.1.0 to 3

Bumps [codecov/codecov-action](https://github.com/codecov/codecov-action) from 2.1.0 to 3.
- [Release notes](https://github.com/codecov/codecov-action/releases)
- [Changelog](https://github.com/codecov/codecov-action/blob/master/CHANGELOG.md)
- [Commits](codecov/codecov-action@f32b3a3...e3c5604)

---
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>

* update version comment

Signed-off-by: cpanato <ctadeu@gmail.com>

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

.github/workflows/main.yml

@@ -41,6 +41,6 @@ jobs:
       - name: Test
         run: go test -v -coverprofile=coverage.txt -covermode=atomic ./...
       - name: Upload Coverage Report
-        uses: codecov/codecov-action@f32b3a3741e1053eb607407145bc9619351dc93b # v2.1.0
+        uses: codecov/codecov-action@e3c560433a6cc60aec8812599b7844a7b4fa0d71 # v3.0.0
       - name: Ensure no files were modified as a result of the build
         run: git update-index --refresh && git diff-index --quiet HEAD -- || git diff --exit-code