Update bug.yml

Author: marwie

.github/ISSUE_TEMPLATE/bug.yml

@@ -113,7 +113,7 @@ body:
       options:
         - 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
+        - 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