build(deps): bump trust-dns-resolver (#1311)

Bumps [trust-dns-resolver](https://github.com/bluejekyll/trust-dns) from 0.21.0-alpha.3 to 0.21.0-alpha.4.
- [Release notes](https://github.com/bluejekyll/trust-dns/releases)
- [Changelog](https://github.com/bluejekyll/trust-dns/blob/main/CHANGELOG.md)
- [Commits](bluejekyll/trust-dns@v0.21.0-alpha.3...v0.21.0-alpha.4)

---
updated-dependencies:
- dependency-name: trust-dns-resolver
  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>
(cherry picked from commit 24ddbc3)
Signed-off-by: Oliver Gould <ver@buoyant.io>

Cargo.lock

@@ -2397,9 +2397,9 @@ dependencies = [
 
 [[package]]
 name = "trust-dns-proto"
-version = "0.21.0-alpha.3"
+version = "0.21.0-alpha.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0c92f7753caf275df6cff04b2ecbade15d62dbe38edf57e764180ba011d077ce"
+checksum = "d2e43c627e8301d45629cdfaf63e2e0c57305a07e9f1ea48208fd262ba2d87eb"
 dependencies = [
  "async-trait",
  "cfg-if",
@@ -2422,9 +2422,9 @@ dependencies = [
 
 [[package]]
 name = "trust-dns-resolver"
-version = "0.21.0-alpha.3"
+version = "0.21.0-alpha.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "717ae0b892f6e9f251ee878f7d3625f145d53c5df2fd67f751e85dc00b5cc4f6"
+checksum = "3aec2bf8a00c7dc8afbf61e7e7fc1f419c58af67d29c5857eb93fe089a1fe089"
 dependencies = [
  "cfg-if",
  "futures-util",

linkerd/dns/Cargo.toml

@@ -12,6 +12,6 @@ linkerd-dns-name = { path = "./name" }
 linkerd-error = { path = "../error" }
 thiserror = "1.0"
 tracing = "0.1.29"
-trust-dns-resolver = "0.21.0-alpha.3"
+trust-dns-resolver = "0.21.0-alpha.4"
 tokio = { version = "1", features = ["rt", "sync", "time"] }
 pin-project = "1"