Update changelog in preparation for release v0.25.0 (#402)

* Update changelog in preparation for release v0.25.0

* Fix copy/paste error

CHANGELOG.md

@@ -4,6 +4,21 @@ 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).
 
+## [0.25.0] - 2022-02-21
+
+This release contains a few minor updates as well as a major cleanup of the codebase. See the [Reduce Complexity](https://github.com/open-telemetry/opentelemetry-log-collection/milestone/2?closed=1) milestone for full details on the cleanup.
+
+### Added
+- `source_identifier` setting to `recombine` operator, to ensure partial entries are joined to others from the same file, or other source. ([PR341](https://github.com/open-telemetry/opentelemetry-log-collection/pull/341))
+- `max_sources` setting to `recombine` operator, which limits the number of unique sources that may accumulate partial entries. ([PR341](https://github.com/open-telemetry/opentelemetry-log-collection/pull/341))
+
+### Fixed
+- On Windows, `file_input` will immediately close files after reading. ([PR366](https://github.com/open-telemetry/opentelemetry-log-collection/pull/366))
+
+### Changed
+- When `file_input` cannot open a file, it will print a debug level log instead of an error level log. ([PR357](https://github.com/open-telemetry/opentelemetry-log-collection/pull/357))
+
+
 ## [0.24.0] - 2021-12-21
 
 ### Added