Fixes #37 - make technologies' names all lowercase

Author: Angeluz-07

time_tracker_api/time_entries/time_entries_namespace.py

@@ -32,7 +32,7 @@
         ),
         example=faker.words(
             3,
-            ['Java', 'Elixir', 'Python', 'Docker'],
+            ['java', 'elixir', 'python', 'docker'],
             unique=True
         )
     ),