updating_clang.md: Fix Oauth2 typo

TBR=thakis

Bug: none
Change-Id: I27e13b73a761535bfae448c5090e2da664bf756e
Reviewed-on: https://chromium-review.googlesource.com/c/1270720
Reviewed-by: Hans Wennborg <[email protected]>
Reviewed-by: Nico Weber <[email protected]>
Commit-Queue: Hans Wennborg <[email protected]>
Cr-Commit-Position: refs/heads/master@{#597885}
diff --git a/docs/updating_clang.md b/docs/updating_clang.md
index 70f9da3..d7ed64a 100644
--- a/docs/updating_clang.md
+++ b/docs/updating_clang.md
@@ -65,7 +65,7 @@
 
         $ PYTHONPATH=$(dirname $(which git-cl)) python -c"import auth;auth.OAUTH_CLIENT_ID='62121018386-h08uiaftreu4dr3c4alh3l7mogskvb7i.apps.googleusercontent.com';auth.OAUTH_CLIENT_SECRET='vc1fZfV1cZC6mgDSHV-KSPOz';print auth.get_authenticator_for_host('pinpoint',auth.make_auth_config()).login()"
 
-    b.  Generate a fresh Oath2 token:
+    b.  Generate a fresh Oauth2 token:
 
         $ TOKEN=$(PYTHONPATH=$(dirname $(which git-cl)) python -c"import auth;print auth.get_authenticator_for_host('pinpoint',auth.make_auth_config()).get_access_token().token")