Update elasticsearch7-dsl source directory name

Author: pearsondaniels

docs/conf.py

@@ -31,7 +31,7 @@
 import datetime
 import os
 
-import elasticsearch_dsl
+import elasticsearch7_dsl
 
 # If extensions (or modules to document with autodoc) are in another directory,
 # add these directories to sys.path here. If the directory is relative to the
@@ -70,7 +70,7 @@
 # built documents.
 
 # The short X.Y version.
-version = elasticsearch_dsl.__versionstr__
+version = elasticsearch7_dsl.__versionstr__
 # The full version, including alpha/beta/rc tags.
 release = version