docs(router): reword relativeLinkResolution docs to not mention version numbers (#26991)

PR Close #26991

packages/router/src/router_module.ts

@@ -444,8 +444,8 @@ export interface ExtraOptions {
    *
    * `<a [routerLink]="['../a']">Link to A</a>`
    *
-   * In other words, you're required to use `../` rather than `./`. The current default in v6
-   * is `legacy`, and this option will be removed in v7 to default to the corrected behavior.
+   * In other words, you're required to use `../` rather than `./`. This is currently the default
+   * behavior. Setting this option to `corrected` enables the fix.
    */
   relativeLinkResolution?: 'legacy'|'corrected';
 }