Prerequisites

• I have written a descriptive issue title
• I have searched existing issues to ensure the bug has not already been reported

Fastify version

4.11.0

Plugin version

No response

Node.js version

19.x

Operating system

Linux

Operating system version (i.e. 20.04, 11.3, 10)

linux mint

Description

I try to add custom parser to parse all image files.
I copy image content parser code from fastify documentation but fail to capture any image format.
This code throw error:
FastifyError: Unsupported Media Type: image/jpeg\n at ContentTypeParser.run.

fastify.addContentTypeParser(/^image\/.*/, { parseAs: "buffer" }, (req, payload, done) => {
	done(null, payload)
});

But when i remove regrex and add hardcoded image format then no error thrown and image parsed successfully.
This code work:

fastify.addContentTypeParser("image/png", { parseAs: "buffer" }, (req, payload, done) => {
	done(null, payload)
});

Steps to Reproduce

fastify.addContentTypeParser(/^image\/.*/, { parseAs: "buffer" }, (req, payload, done) => {
  done(null, payload);
});

Expected Behavior

I want to capture all image mime type format.
Suggested regrex must work.