Update deploying.rst (#1392)

Use same base url for Apache as in the example

docs/deploying.rst

@@ -185,7 +185,7 @@ For `Apache <https://httpd.apache.org/>`__, you can use the ``ProxyPass`` direct
 
 Then add these directives to proxy traffic::
 
-    ProxyPass /datasette-prefix/ http://127.0.0.1:8009/datasette-prefix/
+    ProxyPass /my-datasette/ http://127.0.0.1:8009/my-datasette/
     ProxyPreserveHost On
 
 The `ProxyPreserveHost On <https://httpd.apache.org/docs/2.4/mod/mod_proxy.html#proxypreservehost>`__ directive ensures that the original ``Host:`` header from the incoming request is passed through to Datasette. Datasette needs this to correctly assemble links to other pages using the :ref:`datasette_absolute_url` method.