JAX-RS spec model generation missing @JsonProperty-Annotation on setters

Description

JAX-RS spec model generation: The following annotation is missing on setters in pojo.mustache:
@JsonProperty("{{baseName}}")
so the json body on POST-Requests are not transformed to camel case property names. The opposite direction (responses bodies) with dashed property names are converted correctly.

openapi-generator version

Version 5.1.0

Maven Command line used for generation

                             <execution>
				<id>openapi-codegen-java-sources</id>
				<phase>generate-sources</phase>
				<goals>
					<goal>generate</goal>
				</goals>
				<configuration>
					<inputSpec>${project.basedir}/openapi.yaml</inputSpec>
					<output>${project.build.directory}/generated-sources</output>

					<generatorName>jaxrs-spec</generatorName>
					<templateDirectory>custom-templates</templateDirectory>
					<apiPackage>de.gebit.rp.template3.ohcaa.api</apiPackage>
					<generateApis>false</generateApis>
					<generateApiDocumentation>false</generateApiDocumentation>
					<generateApiTests>false</generateApiTests>

					<modelPackage>de.gebit.rp.template3.ohcaa.api.model</modelPackage>
					<generateModels>true</generateModels>
					<generateModelDocumentation>false</generateModelDocumentation>
					<generateModelTests>false</generateModelTests>

					<configOptions>
						<sourceFolder>.</sourceFolder>
						
						<openApiSpecFileLocation>openapi-generated.yaml</openApiSpecFileLocation>
						<interfaceOnly>true</interfaceOnly>
						<generatePom>false</generatePom>
						<useBeanValidation>true</useBeanValidation>
						<useSwaggerAnnotations>false</useSwaggerAnnotations>
						<returnResponse>true</returnResponse>
						<dateLibrary>java8</dateLibrary>
						<hideGenerationTimestamp>true</hideGenerationTimestamp>
						<useTags>true</useTags>
						<generateBuilders>false</generateBuilders>
					</configOptions>
				</configuration>
			</execution>

Steps to reproduce

Provide an openapi spec with schema elements with dashed property names for example:
components:
schemas:
Error:
type: object
properties:
error_name:
type: string
error_detail:
type: string

Suggest a fix/enhancement

Add @JsonProperty in

pojo.mustache line 50:
...
@JsonProperty("{{baseName}}")
public void {{setter}}({{{datatypeWithEnum}}} {{name}}) {
this.{{name}} = {{name}};
}

Start at pojo.mustache around line 50 and generate a jaxrs-spec model from an OpenAPI schema containing dashed property names such as error_name. Verify the generated setters include the requested @JsonProperty annotation and that the generated model handles the property names correctly for POST request bodies.