Update go version in brew command line in CONTRIBUTING.md
The go version in the brew command line didn't match the version of go listed above in the list of requirements.
@@ -22,7 +22,7 @@ To hack on Pulumi, you'll need to get a development environment set up. You'll w
You can easily get all required dependencies with brew and npm
```bash
-brew install node pipenv python@3 typescript yarn go@1.13 golangci/tap/golangci-lint pulumi/tap/pulumictl
+brew install node pipenv python@3 typescript yarn go@1.17 golangci/tap/golangci-lint pulumi/tap/pulumictl
curl https://raw.githubusercontent.com/Homebrew/homebrew-cask/0272f0d33f/Casks/dotnet-sdk.rb > dotnet-sdk.rb # v3.1.0
brew install --HEAD -s dotnet-sdk.rb
rm dotnet-sdk.rb
