docs: Add a note about installing the compressed file for the CLI

Since v1.18.0 there are compressed files available under the `bundle/`
directory in releases.crossplane.io. This commit adds the functionality
of downloading the compressed file and unpacking it, instead of
downloading the binary, which would save some bandwidth.

This commit documents this functionality.
Related PR: crossplane/crossplane#6436

Signed-off-by: Theo Chatzimichos <tampakrap@gmail.com>

Author: tampakrap

content/master/cli/_index.md

@@ -33,12 +33,26 @@ curl -sL "https://raw.githubusercontent.com/crossplane/crossplane/main/install.s
 [The script](https://raw.githubusercontent.com/crossplane/crossplane/main/install.sh)
 detects your CPU architecture and downloads the latest stable release.
 
+### Download the compressed file instead of the binary
+
+Since v1.18.0 there are also compressed files available. You can ask the
+install script to download and unpack the compressed files instead, which
+should save some bandwidth. Below is an example on how to do that:
+
+```shell
+curl -sL "https://raw.githubusercontent.com/crossplane/crossplane/main/install.sh" | COMPRESSED=True sh
+```
+
 {{<expand "Manually install the Crossplane CLI" >}}
 
 If you don't want to run shell script you can manually download a binary from 
 the Crossplane releases repository at 
 https://releases.crossplane.io/stable/current/bin
 
+If you prefer to download a compressed file from the Crossplane releases
+repository, they are available at
+https://releases.crossplane.io/stable/current/bundle
+
 {{<hint "important" >}}
 <!-- vale write-good.Passive = NO -->
 The CLI is named `crank` in the release repository. Download this file.