Update the README.

README.md

@@ -67,7 +67,7 @@ It creates and sends a notification to the server.
   ```
 
   - Exit:
-    - Enter the empty `title` and the empty`message`.
+    - Enter the empty `title` and the empty `message`.
     - `Ctlr + C` (`C-c`).
 
 - Notify once using text:
@@ -82,10 +82,10 @@ It creates and sends a notification to the server.
 - Notify once using a file content:
   ```
   python -m notification_producer.main notify file --file README.md
-  python -m notification_producer.main notify file --title file_greeting --file README.md
+  python -m notification_producer.main notify file --title file_notification --file README.md
   # or
-  python3 -m notification_producer.main notify file --file README.md
-  python3 -m notification_producer.main notify file --title file_greeting --file README.md
+  python3 -m notification_producer.main notify file README.md
+  python3 -m notification_producer.main notify file --title file_notification README.md
   ```
 
 # Author