[kotlin] Fix #5247 incorrect enum parameter type for arrays (#5435)

Author: grEvenX

modules/openapi-generator/src/main/resources/kotlin-client/data_class.mustache

@@ -60,7 +60,7 @@ import java.io.Serializable
     * Values: {{#allowableValues}}{{#enumVars}}{{&name}}{{^-last}},{{/-last}}{{/enumVars}}{{/allowableValues}}
     */
     {{#multiplatform}}@Serializable(with = {{nameInCamelCase}}.Serializer::class){{/multiplatform}}
-    {{#nonPublicApi}}internal {{/nonPublicApi}}enum class {{{nameInCamelCase}}}(val value: {{#isListContainer}}{{{ nestedType }}}{{/isListContainer}}{{^isListContainer}}{{{dataType}}}{{/isListContainer}}){
+    {{#nonPublicApi}}internal {{/nonPublicApi}}enum class {{{nameInCamelCase}}}(val value: {{^isContainer}}{{dataType}}{{/isContainer}}{{#isContainer}}kotlin.String{{/isContainer}}){
     {{#allowableValues}}
     {{#enumVars}}
         {{^multiplatform}}