docs: fix go install command (#677)

README.md

@@ -61,7 +61,7 @@ You have several options there:
 - install via [MacPorts](https://www.macports.org): `sudo port selfupdate && sudo port install k3d` (MacPorts is available for MacOS)
 - install via [AUR](https://aur.archlinux.org/) package [rancher-k3d-bin](https://aur.archlinux.org/packages/rancher-k3d-bin/): `yay -S rancher-k3d-bin`
 - grab a release from the [release tab](https://github.com/rancher/k3d/releases) and install it yourself.
-- install via go: `go install github.com/rancher/k3d` (**Note**: this will give you unreleased/bleeding-edge changes)
+- install via go: `go install github.com/rancher/k3d@latest` (**Note**: this will give you unreleased/bleeding-edge changes)
 - use [Chocolatey](https://chocolatey.org/): `choco install k3d` (Chocolatey package manager is available for Windows)
   - package source can be found in [erwinkersten/chocolatey-packages](https://github.com/erwinkersten/chocolatey-packages/tree/master/automatic/k3d)
 

docs/index.md

@@ -81,7 +81,7 @@ Use the install script to grab a specific release (via `TAG` environment variabl
       *Note*: `asdf plugin-add k3d`, then `asdf install k3d <tag>` with `<tag> = latest` or `4.x.x` for a specific version (maintained by [spencergilbert/asdf-k3d](https://github.com/spencergilbert/asdf-k3d))
 
     - Others
-      - install via go: `#!bash go install github.com/rancher/k3d` (**Note**: this will give you unreleased/bleeding-edge changes)
+      - install via go: `#!bash go install github.com/rancher/k3d@latest` (**Note**: this will give you unreleased/bleeding-edge changes)
 
 ## Quick Start