Setting displayOperationId to false does not work.

[dennis-bullee-entrnce]

Describe the bug

• Setting displayOperationId to false does not work.

To Reproduce
Using springdoc-openui 1.6.6

1. Set displayOperationId to false using SwaggerUiConfigProperties
2. SpringDocPropertiesUtils changes booleans into strings.
3. swagger-config endpoint will return displayOperationId: "false"
4. displayOperationId: "false" evaluates to true in swagger-ui
5. Operation Id is displayed

Expected behavior
Operation Id is not displayed

Screenshots
Response:

UI:

Additional context
Seems to me SpringDocPropertiesUtils should put booleans in the properies map.
If swagger-ui should be able to deal with boolean values as string, I will have to submit an issue there.