update install guide to mention delay in Brew
@@ -13,6 +13,8 @@ The Flow CLI can be installed on macOS, Windows (7 or greater) and most Linux sy
brew install flow-cli
```
+Note: it could take up to one hour for a new version to be propagated to Brew. In case you want to use the latest version immediately, follow the [instrcutions](#from-a-pre-built-binary) in the section below.
+
### From a pre-built binary
_This installation method only works on x86-64._
