Add time format example to the description of commands that use TimeSpan. (#267)

This PR was made to help users who are trying /remind for the first time
by showing an example of the correct time format in the description.

---------

Signed-off-by: Macintxsh <95250141+mctaylors@users.noreply.github.com>
Signed-off-by: mctaylors <cantsendmails@mctaylors.ru>

src/Messages.Designer.cs

@@ -1178,5 +1178,11 @@ namespace Octobot {
                 return ResourceManager.GetString("EightBallNegative5", resourceCulture);
             }
         }
+
+        internal static string TimeSpanExample {
+            get {
+                return ResourceManager.GetString("TimeSpanExample", resourceCulture);
+            }
+        }
     }
 }