Update Java Micronaut modelEnum.mustache File

Signed-off-by: Chrimle <28791817+Chrimle@users.noreply.github.com>

Author: Chrimle

modules/openapi-generator/src/main/resources/java-micronaut/common/model/modelEnum.mustache

@@ -6,6 +6,9 @@ import com.fasterxml.jackson.annotation.JsonValue;
 /**
  * {{^description}}Gets or Sets {{{name}}}{{/description}}{{#description}}{{description}}{{/description}}
  */
+{{#isDeprecated}}
+@Deprecated
+{{/isDeprecated}}
 {{#additionalEnumTypeAnnotations}}
 {{{.}}}
 {{/additionalEnumTypeAnnotations}}{{#useBeanValidation}}@Introspected