Merge pull request opensearch-project#26 from lukas-vlcek/fix_license…

…_link

Fix LICENSE file link

CONTRIBUTING.md

@@ -41,7 +41,7 @@ GitHub provides additional document on [forking a repository](https://help.githu
 
 ## Developer Certificate of Origin
 
-OpenSearch is an open source product released under the Apache 2.0 license (see either [the Apache site](https://www.apache.org/licenses/LICENSE-2.0) or the [LICENSE.txt file](LICENSE)). The Apache 2.0 license allows you to freely use, modify, distribute, and sell your own products that include Apache 2.0 licensed software.
+OpenSearch is an open source product released under the Apache 2.0 license (see either [the Apache site](https://www.apache.org/licenses/LICENSE-2.0) or the [LICENSE.txt file](LICENSE.txt)). The Apache 2.0 license allows you to freely use, modify, distribute, and sell your own products that include Apache 2.0 licensed software.
 
 We respect intellectual property rights of others and we want to make sure all incoming contributions are correctly attributed and licensed. A Developer Certificate of Origin (DCO) is a lightweight mechanism to do that.
 
@@ -112,4 +112,4 @@ New files in your code contributions should contain the following license header
 
 ## Licensing
 
-See the [LICENSE](LICENSE) file for our project's licensing. We will ask you to confirm the licensing of your contribution.
+See the [LICENSE](LICENSE.txt) file for our project's licensing. We will ask you to confirm the licensing of your contribution.