Update changelog

Author: Seldaek

CHANGELOG.md

@@ -1,3 +1,17 @@
+## 3.8.0 (2022-05-10)
+
+* Deprecated ambiguous `elasticsearch` type, use `elastica` instead
+* Added support for Monolog 3.0 (requires symfony/monolog-bridge 6.1)
+* Added support for `AsMonologProcessor` to autoconfigure processors
+* Added support for `FallbackGroupHandler`
+* Added support for `ElasticsearchHandler` as `elastic_search` type
+* Added support for `ElasticaHandler` as `elastica` type
+* Added support for `TelegramBotHandler` as `telegram`
+* Added `fill_extra_context` flag for `sentry` handlers
+* Added support for configuring PsrLogMessageProcessor (`date_format` and `remove_used_context_fields`)
+* Fixed issue on Windows + PHP 8, workaround for https://github.com/php/php-src/issues/8315
+* Fixed MongoDBHandler support when no client id is provided
+
 ## 3.7.1 (2021-11-05)
 
 * Indicate compatibility with Symfony 6