[BUG] [SPRING] not able to get example value in @ApiParam when it is defined in spec

Bug Report Checklist

• Have you provided a full/minimal spec to reproduce the issue?
• Have you validated the input using an OpenAPI validator (example)?
• What's the version of OpenAPI Generator used?
• Have you search for related issues/PRs?
• What's the actual output vs expected output?
• [Optional] Bounty to sponsor the fix (example)

Description

I am not able to get an example value in @ApiParam when I tried to generate spring code.

OpenAPI declaration file content

openapi: 3.0.1
info:
  title: Swagger Petstore
  version: 1.0.0
tags:
  - name: pet
    description: Everything about your Pets
paths:
  '/pet/{petId}/{petId2}':
    get:
      tags:
        - pet
      summary: Find pet by ID
      description: Returns a single pet
      operationId: getPetById
      parameters:
        - name: petId
          in: path
          description: ID of pet to return
          required: true
          schema:
            type: integer
            format: int64
            example: 12
        - name: petId2
          in: path
          description: petId2
          required: true
          schema:
            type: string
            example: ashim
      responses:
        '200':
          description: successful operation
          content: {}

Command line used for generation

docker run --rm \
    -v $PWD:/local openapitools/openapi-generator-cli generate \
    -i /local/petstore.yaml \
    -g spring \
    -o /local/out/spring

Steps to reproduce

After the code generation, there is no example in PetApi for petId and petId2.

https://github.com/ashimjk/openapi-ex

Start with the supplied petstore.yaml and the Spring generator output, especially PetApi, and compare the schema examples for petId and petId2 with the generated parameter annotations. Reproduce the issue with the documented Docker command; done means the generated PetApi exposes the example values for both parameters.