[BUG] Boolean type mismatch for kotlin-spring generator?

[Newbrict]

Bug Report Checklist

• Have you provided a full/minimal spec to reproduce the issue?
• Have you validated the input using an OpenAPI validator?
• Have you tested with the latest master to confirm the issue still exists?
• Have you searched for related issues/PRs?
• What's the actual output vs expected output?
• [Optional] Sponsorship to speed up the bug fix or feature request (example)

Description

When generating with kotlin-spring on version 7.13.0 or 7.14.0, this schema will produce an error:
"The boolean literal does not conform to the expected type String"

Version 7.12.0 does not cause this problem

openapi-generator version

7.13.0 & 7.14.0 -- it works fine on 7.12.0

OpenAPI declaration file content or url

openapi: 3.0.4
info:
    title: Boolean bug
    version: 1.0.0
paths:
    /example:
        post:
            parameters:
            - name: headerBoolean
              in: header
              schema:
                type: boolean
                default: false
            responses:
                "200":
                    description: "N/A"

Generation Details

generator options:
kotlin-spring
delegatePattern true
useSpringBoot3 true
modelMutable true

Steps to reproduce

Just generate with these parameters and it will generate invalid Kotlin.

[Newbrict]

I think I found a relevant commit? I'm not sure.
a7159f6

@cgpoh can you please comment if this is related?