fix a typo

Author: lixit

hfdocs/source/installation.mdx

@@ -28,7 +28,7 @@ You should install `timm` in a [virtual environment](https://docs.python.org/3/l
    # Deactivate the virtual environment
    source .env/bin/deactivate
    ```
-`
+
 Once you've created your virtual environment, you can install `timm` in it.
 
 ## Using pip