a11y: Page should start with a level 1 heading

[juliannemarik]

Q&A

• OS: [e.g. macOS]: macOS
• Browser: [e.g. chrome, safari]: Chrome
• Version: [e.g. 22]: 136
• Method of installation: [e.g. npm, dist assets]: @nestjs/swagger via npm
• Swagger-UI version: [e.g. 3.10.0]: @nestjs/swagger version 11.2.0 which uses Swagger UI version 5.21.0.
• Swagger/OpenAPI version: [e.g. Swagger 2.0, OpenAPI 3.0]: OpenAPI version 3.0

Content & configuration

Basic/default configuration

Describe the bug you're encountering

The main heading of the page is not using an h1 heading:

Expected behavior

h1 should be used for the main heading of the page to meet accessibility requirements: