Fix typo in sync_and_compile.py docs
Fix typo in sync_and_compile.py docs

Change-Id: I5b7671e23a5de50b0e12fc1488f7f2fde4a0e424
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/583436
Reviewed-by: John Stiles <f4fcf42d3bb5924557f1eeb3be66747535e585da@google.com>

google/skia,google/skia,google/skia,google/skia,google/skia,google/skia,google/skia,google/skia,google/skia,google/skia