Examples lost when it begins with number

[ragutsky]

Describe the bug

If examples start with a number and not wrapped to double quotes, only number is preserved and rest part is omitted.

To Reproduce
Steps to reproduce the behavior:

1. Add some DTO with field like:

        @Schema(description = "Address line 1", example = "170 Oaklands Grove")
        String addressLine1

2. Check yaml:

        address_line1:
          type: "string"
          description: "Address line 1"
          example: 170

• What version of spring-boot you are using?
  Spring Boot 4.0.2
• What modules and versions of springdoc-openapi are you using?
  Springdoc 3.0.1
• What is the actual and the expected result using OpenAPI Description (yml or json)?
  Actual:

        address_line1:
          type: "string"
          description: "Address line 1"
          example: 170

Expected:

        address_line1:
          type: "string"
          description: "Address line 1"
          example: "170 Oaklands Grove"

Expected behavior

Example in yml should have the value defined in annotation 170 Oaklands Grove, not just 170.
Expected:

        address_line1:
          type: "string"
          description: "Address line 1"
          example: "170 Oaklands Grove"

Additional context

If wrapped to double quotes it works fine

        @Schema(description = "Address line 1", example = "\"170 Oaklands Grove\"")
        String addressLine1,

[Mattias-Sehlstedt]

This is a known bug from swagger-core that has recently been fixed. The fix should come to springdoc-openapi with this PR.