Merge pull request dotnet/corefx#35279 from wtgodbe/preview4
authorWilliam Godbe <wigodbe@microsoft.com>
Wed, 13 Feb 2019 18:07:08 +0000 (10:07 -0800)
committerGitHub <noreply@github.com>
Wed, 13 Feb 2019 18:07:08 +0000 (10:07 -0800)
Update branding for preview4

Commit migrated from https://github.com/dotnet/corefx/commit/5726c1ee1c70d06dd7dee318e868c8cd820e479b


Trivial merge