Fix a typo in base/util/type_safety/OWNERS

Bug: None
Change-Id: I7a1cde140753c16d8a7a6b76d7a15d305b7b9626
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1699058
Auto-Submit: Yutaka Hirano <yhirano@chromium.org>
Commit-Queue: Daniel Cheng <dcheng@chromium.org>
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Cr-Commit-Position: refs/heads/master@{#676807}

base/util/type_safety/OWNERS

-lukasza@chromium.com
+lukasza@chromium.org
 mpawlowski@opera.com