Fix link to LICENSE.txt (#376)

Author: ohltyler

CONTRIBUTING.md

@@ -56,6 +56,6 @@ If you discover a potential security issue in this project we ask that you notif
 
 ## Licensing
 
-See the [LICENSE](https://github.com/opendistro-for-elasticsearch/anomaly-detection-kibana-plugin/blob/master/LICENSE) file for our project's licensing. We will ask you to confirm the licensing of your contribution.
+See the [LICENSE](https://github.com/opendistro-for-elasticsearch/anomaly-detection-kibana-plugin/blob/master/LICENSE.txt) file for our project's licensing. We will ask you to confirm the licensing of your contribution.
 
-We may ask you to sign a [Contributor License Agreement (CLA)](http://en.wikipedia.org/wiki/Contributor_License_Agreement) for larger changes.
+We may ask you to sign a [Contributor License Agreement (CLA)](http://en.wikipedia.org/wiki/Contributor_License_Agreement) for larger changes.

release-notes/opendistro-for-elasticsearch-anomaly-detection-kibana-plugin.release-notes-1.13.0.0.md

@@ -35,6 +35,7 @@ Compatible with Kibana 7.10.2
 - Update draft release notes config to use URL ([#358](https://github.com/opendistro-for-elasticsearch/anomaly-detection-kibana-plugin/pull/358))
 - Remove copyright year for newly added files ([#367](https://github.com/opendistro-for-elasticsearch/anomaly-detection-kibana-plugin/pull/367))
 - Add release notes for version 1.13.0.0 ([#375](https://github.com/opendistro-for-elasticsearch/anomaly-detection-kibana-plugin/pull/375))
+- Fix link to LICENSE.txt ([#376](https://github.com/opendistro-for-elasticsearch/anomaly-detection-kibana-plugin/pull/376))
 
 ### Maintenance