fix: okhttp-gson model indentation

Author: Nicklas2751

modules/openapi-generator/src/main/resources/Java/libraries/okhttp-gson/model.mustache

@@ -30,6 +30,6 @@ import org.hibernate.validator.constraints.*;
 
 {{#models}}
 {{#model}}
-    {{#isEnum}}{{>modelEnum}}{{/isEnum}}{{^isEnum}}{{#vendorExtensions.x-is-one-of-interface}}{{>oneof_interface}}{{/vendorExtensions.x-is-one-of-interface}}{{^vendorExtensions.x-is-one-of-interface}}{{#oneOf}}{{#-first}}{{>oneof_model}}{{/-first}}{{/oneOf}}{{^oneOf}}{{#anyOf}}{{#-first}}{{>anyof_model}}{{/-first}}{{/anyOf}}{{^anyOf}}{{>pojo}}{{/anyOf}}{{/oneOf}}{{/vendorExtensions.x-is-one-of-interface}}{{/isEnum}}
+{{#isEnum}}{{>modelEnum}}{{/isEnum}}{{^isEnum}}{{#vendorExtensions.x-is-one-of-interface}}{{>oneof_interface}}{{/vendorExtensions.x-is-one-of-interface}}{{^vendorExtensions.x-is-one-of-interface}}{{#oneOf}}{{#-first}}{{>oneof_model}}{{/-first}}{{/oneOf}}{{^oneOf}}{{#anyOf}}{{#-first}}{{>anyof_model}}{{/-first}}{{/anyOf}}{{^anyOf}}{{>pojo}}{{/anyOf}}{{/oneOf}}{{/vendorExtensions.x-is-one-of-interface}}{{/isEnum}}
 {{/model}}
 {{/models}}