API Docs: fix typo in begin_transaction docstring. (#819)

Author: stefano-ottolenghi

neo4j/_async/work/session.py

@@ -410,7 +410,7 @@ async def begin_transaction(
             At most one transaction may exist in a session at any point in time.
             To maintain multiple concurrent transactions, use multiple concurrent sessions.
 
-            Note: For auto-transaction (AsyncSession.run) this will trigger an consume for the current result.
+            Note: For auto-transaction (AsyncSession.run) this will trigger a consume for the current result.
 
         :param metadata:
             a dictionary with metadata.

neo4j/_sync/work/session.py

@@ -410,7 +410,7 @@ def begin_transaction(
             At most one transaction may exist in a session at any point in time.
             To maintain multiple concurrent transactions, use multiple concurrent sessions.
 
-            Note: For auto-transaction (Session.run) this will trigger an consume for the current result.
+            Note: For auto-transaction (Session.run) this will trigger a consume for the current result.
 
         :param metadata:
             a dictionary with metadata.