Merge pull request #523 from aai-institute/chore/516-install-instruct…

…ions-influence

Add small instruction for installing influence extra dependency to README.md

README.md

@@ -75,7 +75,11 @@ You can also install the latest development version from
 pip install pyDVL --index-url https://test.pypi.org/simple/
 ```
 
-pyDVL has also extra dependencies for certain functionalities (e.g. influence functions).
+pyDVL has also extra dependencies for certain functionalities, 
+e.g. for using influence functions run
+```shell
+$ pip install pyDVL[influence]
+```
 
 For more instructions and information refer to [Installing pyDVL
 ](https://pydvl.org/stable/getting-started/installation/) in the