ApiManagement problems with uploading .yml or json files including the word yaml

[DavidJSykes]

aws-api-gateway-developer-portal/dev-portal/src/pages/Admin/ApiManagement.jsx

Lines 100 to 106 in e518f77

	if (file.name.includes('yaml')) {
	swaggerObject = YAML.parse(e.target.result)
	swagger = JSON.stringify(swaggerObject)
	} else {
	swaggerObject = JSON.parse(e.target.result)
	swagger = JSON.stringify(swaggerObject)
	}

Uploading a file ending in .yml does not work; it results in a JSONdecode error when it hits the else block.

The existing code needs to be updated to check for yml, and I would write it to use endsWith instead of includes to avoid having files named yaml.json being an issue.