[fix] pip install command

README.md

@@ -335,7 +335,7 @@ but they can also be built manually.
 To install via Python, just use:
 
 ```
-pip install https://github.com/openvenues/libpostal.git
+pip install git+https://github.com/openvenues/libpostal.git
 ```
 
 **Note**: The Python bindings don't implement libpostal's full API currently.
@@ -362,4 +362,4 @@ Todos
 2. Port language classification from Python, train and publish model
 3. Python bindings and documentation
 4. Publish tests (currently not on Github) and set up continuous integration
-5. Hosted documentation
+5. Hosted documentation