Minor fixes on builder sections on go/android-api-guidelines

- Using "built class", not "build class"
- Wrapped `build()` under code font

PiperOrigin-RevId: 698415583
Change-Id: I4026c55a4bbcc599e55a976907adaae5b21c9512
1 file changed
tree: 1bbb04aa92003594da16decd328fabaa434e39f1
  1. api-guidelines/