docs: fix updating schemas in generated OAS

Author: shahednasser

www/utils/packages/docs-generator/src/classes/kinds/oas.ts

@@ -2573,11 +2573,14 @@ class OasKindGenerator extends FunctionKindGenerator {
         false
 
       const schemaNameChanged =
-        oldSchemaObj!["x-schemaName"] !== newSchemaObj?.["x-schemaName"]
+        !!newSchemaObj?.["x-schemaName"] &&
+        oldSchemaObj!["x-schemaName"] !== newSchemaObj["x-schemaName"]
       wasUpdated = requiredChanged || schemaNameChanged
     }
     oldSchemaObj!.required = newSchemaObj?.required
-    oldSchemaObj!["x-schemaName"] = newSchemaObj?.["x-schemaName"]
+    if (newSchemaObj?.["x-schemaName"]) {
+      oldSchemaObj!["x-schemaName"] = newSchemaObj?.["x-schemaName"]
+    }
 
     return {
       schema: oldSchemaObj,