Bump polling from 3.7.3 to 3.7.4 (#54)

Bumps [polling](https://github.com/smol-rs/polling) from 3.7.3 to 3.7.4.
- [Release notes](https://github.com/smol-rs/polling/releases)
- [Changelog](https://github.com/smol-rs/polling/blob/master/CHANGELOG.md)
- [Commits](https://github.com/smol-rs/polling/compare/v3.7.3...v3.7.4)

---
updated-dependencies:
- dependency-name: polling
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Cargo.lock

@@ -1097,9 +1097,9 @@ checksum = "953ec861398dccce10c670dfeaf3ec4911ca479e9c02154b3a215178c5f566f2"
 
 [[package]]
 name = "polling"
-version = "3.7.3"
+version = "3.7.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cc2790cd301dec6cd3b7a025e4815cf825724a51c98dccfe6a3e55f05ffb6511"
+checksum = "a604568c3202727d1507653cb121dbd627a58684eb09a820fd746bee38b4442f"
 dependencies = [
  "cfg-if",
  "concurrent-queue",