Quotes in Content-Type cause syntax errors

Describe the bug
Running openapi-python-client generate --path api.yml on the input file below fails with:

Generating /tmp/example-client
Error(s) encountered while generating, client was not created

ruff failed

example_client/api/default/put_object.py:34:62: SyntaxError: Simple statements must be separated by newlines or semicolons
   |
33 |     _kwargs["json"] = _body
34 |     headers["Content-Type"] = "application/ld+json; profile="https://www.w3.org/ns/activitystreams""
   |                                                              ^
35 |
36 |     _kwargs["headers"] = headers
   |
[...]

Quotes in the Content-Type should be escaped so that the generated result is legal Python code.

OpenAPI Spec File

openapi: "3.0.0"

info:
  version: 0.0.1
  title: example

paths:
  /object:
    put:
      requestBody:
        content:
          "application/ld+json; profile=\"https://www.w3.org/ns/activitystreams\"":
            schema:
              type: string
      responses:
        '200':
          description: OK

Desktop (please complete the following information):

• OS: Debian 13
• Python Version: 3.12.11
• openapi-python-client version: 0.24.3

使用 issue 中的 OpenAPI 示例，通过 openapi-python-client generate --path api.yml 重现失败，然后追踪 Content-Type 值变成生成的 headers 赋值的位置。带引号的 Content-Type 参数能够生成合法的 Python，并且生成过程在没有报告的 Ruff 语法错误的情况下完成，即表示完成。