bpo-34580: Update sqlite3 examples to call close() explicitly (GH-9079)
The sqlit3.Connection object doesn't call its close() method when it's used
as a context manager.
diff --git a/Doc/includes/sqlite3/mysumaggr.py b/Doc/includes/sqlite3/mysumaggr.py
index d2dfd2c..11f9639 100644
--- a/Doc/includes/sqlite3/mysumaggr.py
+++ b/Doc/includes/sqlite3/mysumaggr.py
@@ -18,3 +18,5 @@
cur.execute("insert into test(i) values (2)")
cur.execute("select mysum(i) from test")
print(cur.fetchone()[0])
+
+con.close()