chore: release v5.2.1: documentation audit fixes

Author: nick-llewellyn

CHANGELOG.md

@@ -1,5 +1,18 @@
 # Changelog
 
+
+## 5.2.1
+
+### Fixed
+
+- Completed the API-summary table in `README.md`, adding the missing `NtsClient`
+  row, `TrustMode` / `TrustBackend` enum variants, and the four missing
+  `defaultBackend*Count` telemetry counters.
+- Corrected the `ntsTrustStatus()` dartdoc observable count (six -> seven) and
+  added the missing description for `defaultBackendCustomCount`.
+- Fixed stale references to "three" atomic loads and counters in the
+  `ntsTrustStatus()` documentation to match the current implementation.
+
 ## 5.2.0
 
 ### Added

pubspec.yaml

@@ -2,7 +2,7 @@ name: nts
 description: >-
   Authenticated network time for Flutter apps, secured by Network
   Time Security (NTS).
-version: 5.2.0
+version: 5.2.1
 homepage: https://github.com/nick-llewellyn/nts
 repository: https://github.com/nick-llewellyn/nts
 issue_tracker: https://github.com/nick-llewellyn/nts/issues

rust/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "nts_rust"
-version = "0.7.0"
+version = "0.7.1"
 edition = "2021"
 publish = false
 license = "MIT"