docs: update readme

Author: AstraBert

README.md

@@ -11,14 +11,9 @@ S3-backed, git-versioned object storage for agents.
 ## Installation
 
 ```bash
-cargo install aggit@0.2.0-alpha
+cargo install aggit@0.3.0-alpha
 ```
 
-
-> [!NOTE]
->
-> `aggit` is not yet compatible with Windows.
-
 ### As an Agent Skill
 
 You can use `aggit` as an agent skill, downloading it with the `skills` CLI tool: