Won't generate client for JSON formatted API with tabs

Describe the bug

Running

openapi-python-client generate --url https://raw.githubusercontent.com/wikimedia/mediawiki-extensions-Wikibase/e45d4f725e25a95ec2b034238fd3736f19053a16/repo/rest-api/specs/openapi.json

gives me the error

Error(s) encountered while generating, client was not created

Invalid YAML from provided source: while scanning for the next token
found character '\t' that cannot start any token
  in "<byte string>", line 2, column 1:
        "openapi": "3.1.0",
    ^

This is a follow-on to this old bug https://github.com/openapi-generators/openapi-python-client/issues/488 which got fixed in https://github.com/openapi-generators/openapi-python-client/commit/b01db03349eb83e4c3ffdd1cc70f7eb2a9c6dae8 . It appears the fix doesn't quite work because github doesn't serve JSON files with the expected content-type (curl with -v gives me "< content-type: text/plain; charset=utf-8").

OpenAPI Spec File
I was trying to generate a client for this code

Desktop (please complete the following information):

• OS: Ubuntu 20.04.6 LTS running under Windows 11
• Python Version: 3.8.0
• openapi-python-client version 0.17.0

Additional context
I think the correct fix ought to be to fall back to JSON parsing in the event of YAML parsing failure (or else a flag to specify?). I'm not sure why the mimetype isn't being guessed right

Start by reproducing the reported command with the linked OpenAPI JSON URL and inspect the source-loading and parsing path that handles its text/plain response. Done means the client generates successfully from this URL and the fallback behavior is covered by a regression test.