docs(CHANGELOG): remove commit-only entries from 3.10.0 release

The 3.10.0 changelog contained duplicate, commit-only entries because
some PRs were merged with merge commits instead of squash commits,
causing release-please to log individual commits rather than a single
PR-linked entry. Keep only entries that link to a PR.

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

Author: gavinbarron

CHANGELOG.md

@@ -5,22 +5,12 @@
 
 ### Features
 
-* adds deserialization of the example extension ([e5a1080](https://github.com/microsoft/OpenAPI.NET/commit/e5a108004a6c4637d4dd7dc27a417a2d3e29d70b))
 * do not ignore multiple types when serializing to 3.0 ([#2960](https://github.com/microsoft/OpenAPI.NET/issues/2960)) ([ebaf27a](https://github.com/microsoft/OpenAPI.NET/commit/ebaf27ac46f8820e7b817cc33e693632c2fc908a))
-* serialize license identifier as extension for earlier versions ([d090989](https://github.com/microsoft/OpenAPI.NET/commit/d0909890d3706152e3ea221660d80ddc69fb8ce5))
-* serialize license identifier as extension for earlier versions ([60971ba](https://github.com/microsoft/OpenAPI.NET/commit/60971ba87ced4162e471ebfc1b878776d09cc62f))
 
 
 ### Bug Fixes
 
-* better nullability round-tripping ([655c2c8](https://github.com/microsoft/OpenAPI.NET/commit/655c2c843732faba3687f8fd64568ba509b0065a))
 * bound YAML anchor/alias expansion to prevent OOM (billion laughs) ([#3000](https://github.com/microsoft/OpenAPI.NET/issues/3000)) ([2179326](https://github.com/microsoft/OpenAPI.NET/commit/21793261d6860fb6e607b71fd95c0bd320724764))
-* deserialize metadata url from extension in earlier version ([9387b01](https://github.com/microsoft/OpenAPI.NET/commit/9387b01188c4d2297eaaaa08f06c41c83179f688))
-* marks deprecated properties from the specification as obsolete ([787b045](https://github.com/microsoft/OpenAPI.NET/commit/787b045faa15f23528be70c9a6fde2d45ec3bd90))
-* marks deprecated properties from the specification as obsolete ([953c22a](https://github.com/microsoft/OpenAPI.NET/commit/953c22aa3b0fba6fecc0e3df21186fb368632ba3))
-* **schema:** serialize compatibility examples from examples list ([5d8ec3a](https://github.com/microsoft/OpenAPI.NET/commit/5d8ec3a32d49059b68d00cf2ee267a6537c1a678))
-* serialize examples as extension in v2/v3 ([ff1dbc9](https://github.com/microsoft/OpenAPI.NET/commit/ff1dbc98dbfc6d7cfb87153c2b61ec3351157f72))
-* serialize examples as extension in v2/v3 ([edf3c67](https://github.com/microsoft/OpenAPI.NET/commit/edf3c6789aafcc6156e193ee6f3bc23d886e8052))
 
 ## [3.9.0](https://github.com/microsoft/OpenAPI.NET/compare/v3.8.0...v3.9.0) (2026-07-15)