docs: update changelog versions

Author: github-actions[bot]

crates/oas3/CHANGELOG.md

@@ -2,6 +2,8 @@
 
 ## Unreleased
 
+## 0.20.2
+
 - The type of the `spec::Operation::callbacks` field is now `BTreeMap<String, ObjectOrReference<Callback>>`.
 - Add `spec::Operation::callbacks()` method.
 - Migrate YAML parsing to `yaml_serde`. Exposed error type(s) have been altered.

crates/roast/CHANGELOG.md

@@ -2,6 +2,8 @@
 
 ## Unreleased
 
+## 0.10.1
+
 - Update `oas3` dependency to `0.21`.
 
 ## 0.10.0