chore: fix typo in jsdocs (#237)

Author: outslept

src/packagejson/types.ts

@@ -209,7 +209,7 @@ export interface PackageJson {
       };
 
   /**
-   * The field is is used to specify different TypeScript declaration files for
+   * The field is used to specify different TypeScript declaration files for
    * different versions of TypeScript, allowing for version-specific type definitions.
    */
   typesVersions?: Record<string, Record<string, string[]>>;