doc: fix link to pre-commit try waterfall Following up on https://chromium-review.googlesource.com/c/angle/angle/+/2157888 Bug: angleproject:1944 Change-Id: Idf732e5e23277ff724c543e16f424b8d5f5385e4 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2175996 Reviewed-by: Yuly Novikov <ynovikov@chromium.org> Commit-Queue: Yuly Novikov <ynovikov@chromium.org>