Fixes#8242
Thought the issue this resolves was closed as "not planned", after further discussion, I was able to explain that the current priority breaks *some* template languages that rely on text existing inside of a `<[CDATA[` inside of a tag.
Additionally, this priority seems to be leftover from when this file was first committed, but there is no indication for why it is present, and it is possible it is a leftover from some debugging.
This change does not break existing injections that currently ship with `nvim-treesitter`, but instead allows additional injections to be defined by users, like those found in the Max/MSP Jitter XML Shader format.
This change also removes the now unnecessarily doubled up parentheses, so I apologize for my original assertion that this was a one line fix, when it is in fact a two line fix 🙂
