Update CHANGELOG

Author: puetzp

CHANGELOG.md

@@ -4,6 +4,13 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.8.2] - 2023-12-30
+### Added
+- `InstantQueryBuilder::query`
+- `RangeQueryBuilder::query`
+
+All changes by courtesy of @alesharik via [pull request](https://github.com/puetzp/prometheus-http-query/pull/12).
+
 ## [0.8.1] - 2023-12-28
 ### Added
 - `InstantQueryBuilder::get_raw`