Update CHANGELOG.md

Author: frankie567

CHANGELOG.md

@@ -19,6 +19,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   ([#3679](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/3679))
 - `opentelemetry-instrumentation`: Avoid calls to `context.detach` with `None` token.
   ([#3673](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/3673))
+- `opentelemetry-instrumentation-starlette` Fixes a crash when host-based routing is used ([#3507](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/3507/))
+- `opentelemetry-instrumentation-fastapi` Fixes a crash when host-based routing is used ([#3507](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/3507/))
 
 ### Added