Update 3-create-yaml.md

Author: darrenj

docs/_docs/solution-accelerators/tutorials/enable-continuous-integration/csharp/3-create-yaml.md

@@ -3,7 +3,7 @@ layout: tutorial
 category: Solution Accelerators
 subcategory: Enable continuous integration
 title: Create a YAML file
-language: C#
+language: csharp
 order: 3
 ---
 
@@ -87,4 +87,4 @@ By default the build pipelines automatically triggers a build on each new pull r
 - pr: none
 + pr: 
 + - master
-```
+```