Update README.md

Adds a Note about Download size in task checkout "$VERSION" and includes `alias ` to `tast='./task'`

README.md

@@ -30,7 +30,7 @@ The Odoo development environment has the following requirements:
 
 **Command Completion (Optional)**
 
-bash/zsh alias `task='./task'` with [completion](https://taskfile.build/#completion).
+bash/zsh `alias task='./task'` with [completion](https://taskfile.build/#completion).
 
 ## Usage
 
@@ -45,6 +45,8 @@ cd Odoo-Build
 
 Checkout the Odoo version. Show supported versions with `task list-versions`.
 
+NOTE: checkout downloads >1 GB when a version is downloaded for the first time. This may take some time depending on bandwidth.
+
 ```bash
 task checkout "$VERSION"
 ```
@@ -436,4 +438,4 @@ partner_firstname (19.0.1.0.0)
 └── base_setup (19.0+c)
     └── web (19.0+c)
 
-```
+```