Bump actions-rs/grcov from 0.1.5 to 0.1.6

Bumps [actions-rs/grcov](https://github.com/actions-rs/grcov) from 0.1.5 to 0.1.6.
- [Release notes](https://github.com/actions-rs/grcov/releases)
- [Changelog](https://github.com/actions-rs/grcov/blob/master/CHANGELOG.md)
- [Commits](actions-rs/grcov@v0.1.5...v0.1.6)

---
updated-dependencies:
- dependency-name: actions-rs/grcov
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

.github/workflows/rust.yml

@@ -38,7 +38,7 @@ jobs:
           RUSTFLAGS: "-Zprofile -Ccodegen-units=1 -Cinline-threshold=0 -Clink-dead-code -Coverflow-checks=off -Cpanic=abort -Zpanic_abort_tests"
           RUSTDOCFLAGS: "-Zprofile -Ccodegen-units=1 -Cinline-threshold=0 -Clink-dead-code -Coverflow-checks=off -Cpanic=abort -Zpanic_abort_tests"
       - name: rust-grcov
-        uses: actions-rs/grcov@v0.1.5
+        uses: actions-rs/grcov@v0.1.6
       - name: Codecov
         uses: codecov/codecov-action@v3.1.4
         with: