Previously, unless you had some other configuration that impacts
ripgrep, `rg -tyaml uses:` would return zero results. After this
changes, it returns more of what you might expect.
This is because ripgrep ignores hidden files and directories by default.
But arguably, searching `.github` by default is probably what we want.
I do the same thing in ripgrep's repository:
de4baa1002/.ignore (L1)
