MONGOID-5496: Update Rails 7 Tutorial (#5515)

* Remove `--skip-bundle` from _Optionally Skip Tests_ section

Author: alexbevi

docs/tutorials/getting-started-rails7.txt

@@ -69,7 +69,7 @@ and ``--skip-system-test`` options:
 
 .. code-block:: sh
 
-    rails new blog --skip-bundle --skip-active-record --skip-test --skip-system-test
+    rails new blog --skip-active-record --skip-test --skip-system-test
     cd blog
 
 Setup Mongoid