[html] bug in default infoUrl

Created by: ndjensen

Description

The default URL in the html generator is incorrect. The default address is https//openapi-generator.tech. It is missing a colon. https://github.com/OpenAPITools/openapi-generator/blob/v3.3.1/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/StaticHtmlGenerator.java#L72

openapi-generator version

3.3.1

OpenAPI declaration file content or url

petstore.yaml

Command line used for generation

java -jar openapi-generator-cli.jar generate -i ~/test_openapi/petstore.yaml -g html -o ~/openapi-output/petstore

Steps to reproduce

Run the html generator without replacing the infoUrl through configuration options.

Related issues/PRs

Suggest a fix/enhancement

Add a colon to line 72 of StaticHtmlGenerator. While in the area, should consider changing the default Apache license URL to be https instead of http.