[BUG] ApiClient.buildRequest using PUT method with no request body leads to exception #14

Preflight checklist

• I could not find a solution in the existing issues, docs, nor discussions.
• I agree to follow this project's Code of Conduct.
• I have read and am following this repository's Contribution Guidelines.
• This issue affects my Ory Cloud project.
• I have joined the Ory Community Slack.
• I am signed up to the Ory Security Patch Newsletter.

Describe the bug

Exception when trying to accept LogoutRequest using Hydra ApiClient.

A corresponding bug has been fixed on openapi-generators side :
Link to the issue : OpenAPITools/openapi-generator#12143
Link to the fix : OpenAPITools/openapi-generator#12172

Since Hydra ApiClient is generated, it would certainly fix the issue to upgrade to fixed openapi version and generate new ApiClient.

Breaks in sh.ory.hydra.ApiClient line 1251 at :

// use an empty request body (for POST, PUT and PATCH)
reqBody = RequestBody.create("", MediaType.parse(contentType));

Reproducing the bug

Steps to reproduce :

1. Create Java project using hydra-client-java
2. Create a Hydra AdminApi using ApiClient
3. Call AdminApi acceptLogoutRequest
   => It breaks

Relevant log output

java.lang.NullPointerException: Parameter specified as non-null is null: method okhttp3.MediaType$Companion.parse, parameter $this$toMediaTypeOrNull
	at okhttp3.MediaType$Companion.parse(MediaType.kt) ~[okhttp-4.9.3.jar:na]
	at okhttp3.MediaType.parse(MediaType.kt) ~[okhttp-4.9.3.jar:na]
	at sh.ory.hydra.ApiClient.buildRequest(ApiClient.java:1225) ~[hydra-client-1.11.7.jar:na]
	at sh.ory.hydra.ApiClient.buildCall(ApiClient.java:1181) ~[hydra-client-1.11.7.jar:na]
	at sh.ory.hydra.api.AdminApi.acceptLogoutRequestCall(AdminApi.java:449) ~[hydra-client-1.11.7.jar:na]
	at sh.ory.hydra.api.AdminApi.acceptLogoutRequestValidateBeforeCall(AdminApi.java:461) ~[hydra-client-1.11.7.jar:na]
	at sh.ory.hydra.api.AdminApi.acceptLogoutRequestWithHttpInfo(AdminApi.java:500) ~[hydra-client-1.11.7.jar:na]
	at sh.ory.hydra.api.AdminApi.acceptLogoutRequest(AdminApi.java:481) ~[hydra-client-1.11.7.jar:na]

Relevant configuration

No response

Version

1.11.7

On which operating system are you observing this issue?

No response

In which environment are you deploying?

No response

Additional Context

No response