OpenApiProperty default array unable to cast to string

**Describe the issue**
swagger or open api documentation document generation throws an error:
Unable to cast object of type 'System.Int32[]' to type 'System.String'

**To Reproduce**
Steps to reproduce the behavior:
1. add attribute
[OpenApiProperty(Default = new int[] { 2, 3 }, Description = "list", Deprecated = false)]
2. swagger.json or openapi.yaml generations fail

**Expected behavior**
documentation document is generated without issues

Start by reproducing swagger.json or openapi.yaml generation with the shown OpenApiProperty attribute and trace where the Int32[] default is converted during document generation. Done means the example generates documentation without the cast-to-String error, while preserving the default array value.

Written by the indexing model from the issue text.