ChromeDriver now supports Apple Silicon ARM processors.
`webdriver-manager` versions 12.1.7 and earlier will, however,
incorrectly download the arm64 ChromeDriver regardless of the
system's architecture. This results in failure to run Protractor tests
on macOS with the error: `spawn Unknown system error -86`
This commit fixes the problem by upgrading `webdriver-manager` to
version 12.1.8, which includes a fix.
See also https://stackoverflow.com/questions/65618558.
PR Close#40756