Describe the bug

I am trying to update the CLI on mac using the brew update && brew upgrade gh command however it is giving me a message with

Warning: github/gh/gh 0.5.2 already installed

Not sure what needs to be done to update to 0.5.3

Steps to reproduce the behavior

1. After installing the cli by using 'brew install github/gh/gh'
2. Try running 'brew update && brew upgrade gh'
3. See warning

Expected vs actual behavior

I expected it to initiate an update using homebrew

Logs

==> Tapping github/gh
Cloning into '/usr/local/Homebrew/Library/Taps/github/homebrew-gh'...
remote: Enumerating objects: 34, done.
remote: Counting objects: 100% (34/34), done.
remote: Compressing objects: 100% (27/27), done.
remote: Total 166 (delta 8), reused 0 (delta 0), pack-reused 132
Receiving objects: 100% (166/166), 29.61 KiB | 2.47 MiB/s, done.
Resolving deltas: 100% (41/41), done.
Tapped 1 formula (28 files, 61.1KB).
==> Installing gh from github/gh
==> Downloading https://github.com/github/homebrew-gh/releases/download/v0.5.2/gh_0.5.2_macOS_amd64.tar.gz
==> Downloading from https://github-production-release-asset-2e65be.s3.amazonaws.com/212587282/a8165500-42ae-11ea-8d73-a12edaa54824?X-Amz-Algorithm=AW
######################################################################## 100.0%

A new release of gh is available: 0.5.2 → v0.5.3
https://github.com/cli/cli/releases/tag/v0.5.3

A new release of gh is available: 0.5.2 → v0.5.3
https://github.com/cli/cli/releases/tag/v0.5.3

==> Caveats
Bash completion has been installed to:
/usr/local/etc/bash_completion.d

zsh completions have been installed to:
/usr/local/share/zsh/site-functions
==> Summary
🍺 /usr/local/Cellar/gh/0.5.2: 8 files, 13.4MB, built in 11 seconds

brew update && brew upgrade gh
Already up-to-date.
Warning: github/gh/gh 0.5.2 already installed