Add patch for kytea 0.4.6

Official zip of kytea 0.4.6 is still broken for mac.
I will patch following fix.
 https://github.com/neubig/kytea/pull/8

After merging this PR, I believe CI will pass.
Then I want to merge #30623
Since the patch is already present in the upstream repository, we can just use the commit URL:

```
https://github.com/neubig/kytea/commit/782553f61bde4f3366f946c9a390500c028fa17f.diff
```