Empty link rendered when no external docs

[anthony-kopczyk]

Q&A (please complete the following information)

• OS: Windows / WSL
• Browser: Chrome
• Method of installation: npm
• Swagger-UI version: 3.43.0
• Swagger/OpenAPI version: OpenAPI 3.0

Describe the bug you're encountering

When an API specification is loaded that does not have external docs, an empty link is rendered on the page.

To reproduce...

Load an API specification into swagger UI that does not have external docs.

Expected behavior

There should be not be an empty link on the page for external doc information

Screenshots

Additional context or thoughts

This looks like it was in one of the latest changes of the info component. A condition was changed from checking externalDocsUrl to externalDocs. Because externalDocs is a map it's always truthy.