chore(prettier): ignore bridge macros target dir

[chris-olszewski]

What was changed

TSIA

Why?

Before

Benchmark 1: npm exec prettier -- --end-of-line auto --check .
  Time (mean ± σ):     11.859 s ±  0.458 s    [User: 14.062 s, System: 2.327 s]
  Range (min … max):   11.107 s … 12.511 s    10 runs

After

Benchmark 1: npm exec prettier -- --end-of-line auto --check .
  Time (mean ± σ):      2.839 s ±  0.028 s    [User: 5.754 s, System: 0.668 s]
  Range (min … max):    2.806 s …  2.898 s    10 runs

Checklist

1. Closes N/A

2. How was this tested:
   N/A

3. Any docs updates needed?
   N/A

[mjameswh]

Nice catch!