Add pypi install option to docs

Author: piperwolters

README.md

@@ -11,7 +11,13 @@ Install `uv` if you haven't already:
 curl -LsSf https://astral.sh/uv/install.sh | sh
 ```
 
-To install dependencies:
+To install dependencies, either:
+```
+pip install olmoearth-pretrain-minimal
+```
+
+OR
+
 ```
 git clone git@github.com:allenai/olmoearth_pretrain_minimal.git
 cd olmoearth_pretrain_minimal