Update bug.yml

Author: marwie

.github/ISSUE_TEMPLATE/bug.yml

@@ -111,7 +111,9 @@ body:
       label: Validations 🩹
       description: Before submitting the issue, please make sure you do the following
       options:
-        - label: I have [searched existing issues](https://github.com/KhronosGroup/UnityGLTF/issues) and I have checked that no issue already exist that reports the same bug to avoid creating a duplicate.
+        - label: I follow the [Code of Conduct](https://www.khronos.org/about/code-of-conduct)
+          required: true
+        - label: I have [searched existing issues](https://github.com/KhronosGroup/UnityGLTF/issues): no issue already exist that reports the same bug
           required: true
         - label: I provided a [minimal reproducible example](https://stackoverflow.com/help/minimal-reproducible-example) of the bug or all necessary files that can be used to reproduce this problem.
           required: false