Remove dkrahn and add other maintainers to OWNERS

Change-Id: I02f7faa53c6c5b90f2ec73c71a7ff0dd95fe74bd
Reviewed-on: https://fuchsia-review.googlesource.com/c/third_party/boringssl/+/510426
Reviewed-by: Aaron Green <aarongreen@google.com>
Commit-Queue: Aaron Green <aarongreen@google.com>
diff --git a/OWNERS b/OWNERS
index 05e3b8c..4f1a6ff 100644
--- a/OWNERS
+++ b/OWNERS
@@ -1,6 +1,7 @@
 aarongreen@google.com
-shanyu@google.com
-dkrahn@google.com
+alizhang@google.com
+ampearce@google.com
 joshlf@google.com
+shanyu@google.com
 
 # COMPONENT: Security