Update CHANGELOG.md (#3172)

Chuan Ren · web-flow · commit 9e1e145af305 · 2019-06-11T17:48:22.000-07:00
diff --git a/Firebase/Auth/CHANGELOG.md b/Firebase/Auth/CHANGELOG.md
@@ -1,3 +1,6 @@
+# v6.1.2
+- Raise an exception when signing in with Facebook using `OAuthProvider`. (#3138)
+
 # v6.1.1
 - Fix an issue where a user can't link with email provider by email link. (#3030)
 
