[InvalidArgumentException] Invalid yml: `/config/swagger.yml

[cnizzardini]

Describe the bug

Encountered the following when navigating to swagger page.

[InvalidArgumentException] Invalid yml: `/config/swagger.yml`. yml must exist on the file system. 
An attempt was made to create `{omitted}/config/swagger.yml`, but permission was denied or the 
file path is bad. Either fix the file system permissions, create the file and/or both. Generally this 
value should be placed in your projects webroot directory.

To Reproduce

Steps to reproduce the behavior:

1. Load up swagger page with non-writable permissions to config/swagger.yml

Expected behavior

• Swagger page loads
• Error message is incorrect, file should actually exist in config/

Version and Platform (please complete the following information):

• OS/Platform: Linux
• CakePHP: ^5.0
• SwaggerBake Version: ^3.0

Additional context

Work around to this is giving write permissions to /config/swagger.yml. Fix will be adjusting the logic to not care about write permissions.