Bump opentelemetry_sdk from 0.21.1 to 0.21.2

Bumps [opentelemetry_sdk](https://github.com/open-telemetry/opentelemetry-rust) from 0.21.1 to 0.21.2.
- [Release notes](https://github.com/open-telemetry/opentelemetry-rust/releases)
- [Commits](https://github.com/open-telemetry/opentelemetry-rust/compare/v0.21.1...v0.21.2)

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

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

Cargo.lock

@@ -1653,9 +1653,9 @@ dependencies = [
 
 [[package]]
 name = "opentelemetry_sdk"
-version = "0.21.1"
+version = "0.21.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "968ba3f2ca03e90e5187f5e4f46c791ef7f2c163ae87789c8ce5f5ca3b7b7de5"
+checksum = "2f16aec8a98a457a52664d69e0091bac3a0abd18ead9b641cb00202ba4e0efe4"
 dependencies = [
  "async-trait",
  "crossbeam-channel",