DOCSP-47875: Add new parse_uri parameter

Author: mcmorisi

source/connect.txt

@@ -145,6 +145,7 @@ your MongoDB connection, you can use the ``parse_uri()`` function. This
 function accepts the following arguments:
 
 - ``uri``: Your MongoDB connection URI.
+- ``db_name``: The name of the database you want to use.
 - ``conn_max_age``: Configures persistent database connections.
   This argument is optional. To learn more, see 
   `Persistent connections <{+django-docs+}/ref/databases/#persistent-database-connections>`__
@@ -165,8 +166,8 @@ example:
 
     import django_mongodb_backend
 
-    MONGODB_URI = "mongodb+srv://my_user:[email protected]/my_database?retryWrites=true&w=majority"
-    DATABASES["default"] = django_mongodb_backend.parse_uri(MONGODB_URI)
+    MONGODB_URI = "mongodb+srv://my_user:[email protected]/?retryWrites=true&w=majority"
+    DATABASES["default"] = django_mongodb_backend.parse_uri(MONGODB_URI, db_name="<database name>")
 
 Additional Information
 ----------------------

source/get-started/connect-mongodb.txt

@@ -64,7 +64,7 @@ you can create a {+framework+} project that connects to MongoDB.
       .. code-block:: python
 
          DATABASES = {
-            "default": django_mongodb_backend.parse_uri("<connection string URI>"),
+            "default": django_mongodb_backend.parse_uri("<connection string URI>", db_name="<database name>"),
          }
 
       Replace the ``<connection string URI>`` placeholder with the connection string