Update bug_report.md

Author: angularsen

.github/ISSUE_TEMPLATE/bug_report.md

@@ -11,7 +11,7 @@ assignees: ''
 A clear and concise description of what the bug is.
 
 **To Reproduce**
-Steps to reproduce the behavior:
+Steps to reproduce the behavior (just an example):
 1. Add nuget UnitsNet 4.9.0 to a .NET 4.0 project
 2. Build using Visual Studio 2017 Community v15.9.2
 3. See error: "foo"