docs: Add tip for psycopg2 issues, #932

docs/local.rst

@@ -18,6 +18,14 @@ When ready, open a shell, and run:
    cd kingfisher-collect
    pip install -r requirements.txt
 
+.. tip::
+
+   If you encounter an error relating to ``psycopg2``, try instead:
+
+   .. code-block:: bash
+
+      pip install psycopg2-binary -r requirements.txt
+
 To extract data from RAR files, you must have the ``unrar`` or `unar <https://theunarchiver.com/command-line>`__ command-line utility.
 
 The next steps assume that you have changed to the ``kingfisher-collect`` directory (the ``cd`` command above).