test: fix typo in test/parallel/test-fs-rm.js

`succesfully` -> `successfully`

PR-URL: #44882
Reviewed-By: Mohammed Keyvanzadeh <mohammadkeyvanzade94@gmail.com>
Reviewed-By: Moshe Atlow <moshe@atlow.co.il>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>

Author: TimShilov

test/parallel/test-fs-rm.js

@@ -413,7 +413,7 @@ if (isGitPresent) {
           });
         } catch (err) {
           // Only fail the test if the folder was not deleted.
-          // as in some cases rmSync succesfully deletes read-only folders.
+          // as in some cases rmSync successfully deletes read-only folders.
           if (fs.existsSync(root)) {
             throw err;
           }