Update constants.py

Author: DogukanUrker

constants.py

@@ -10,7 +10,7 @@
 APP_NAME = "flaskBlog"  # (str)
 
 # Version of the Flask application
-APP_VERSION = "2.2.0"  # (str)
+APP_VERSION = "2.2.1"  # (str)
 
 # Path to the root of the application files
 APP_ROOT_PATH = "."  # (str)