Add a separate section for pixi and conda

docs/website/docs/reference/installation.md

@@ -106,12 +106,12 @@ C:\> .\env\Scripts\activate
 
 You can install `dlt` in your virtual environment by running:
 
-Install dlt using `pip`:
-
 ```sh
 pip install -U dlt
 ```
 
+## Install dlt via pixi and conda
+
 Install dlt using `pixi`:
 
 ```sh