Update README to reflect Mythic v2.3 support

Author: mattreduce

README.md

@@ -9,7 +9,7 @@ agent for Mythic C2. It produces a zipped folder of VS Code extension source
 code, which currently must be packaged by the operator before delivering to
 target/test machines manually or via social engineering.
 
-:white_check_mark: Mythic v2.2+ compatible since v0.2.0  
+:white_check_mark: Mythic v2.3+ compatible since v0.3.0
 :white_check_mark: Cross-platform (tested on macOS, Linux, Windows)  
 :warning: Doesn't support encrypted payloads yet, always use TLS    
 
@@ -43,7 +43,7 @@ The extension must then be manually installed on target in Visual Studio Code.
 This can be done from the editor UI or from the CLI with:
 
 ```shell
-$ code --install-extension venus-0.0.1.vsix
+$ code --install-extension venus-0.3.0.vsix
 ```
 
 ### Commands