docs: improve install script

Author: vmaerten

website/docs/installation.mdx

@@ -185,6 +185,14 @@ default.
 
 :::
 
+By default, it installs the latest version available.
+You can also specify a tag (available in [releases](https://github.com/go-task/task/releases))
+to install a specific version:
+
+```shell
+sh -c "$(curl --location https://taskfile.dev/install.sh)" -- -d v3.36.0
+```
+
 ### GitHub Actions
 
 If you want to install Task in GitHub Actions you can try using