Improve Ruby grammar to recognize method parameters (#8284)

Release Notes:

- Improved Ruby Grammar to recognise various method parameters

![image](https://github.com/zed-industries/zed/assets/7274458/45d4ee2e-d174-4835-a461-22eee428a73b)


![image](https://github.com/zed-industries/zed/assets/7274458/c1bbf307-4f6b-4839-81dc-9d982c85bc58)