Outdated message when spells are older than 30 days

[askamycki]

Describe the bug
Outdated warning message when the spells are old.

To Reproduce
Steps to reproduce the behavior:

1. Modify the access/modified timestamp of the file $DW_HOME/grimoires/lastUpdate.txt to be older than 30 days. Eg:
   touch -d '2023-09-01T00:00:00' ~/.dw/grimoires/lastUpdate.txt
2. Run any spell. Eg:
   dw spell --eval Playground
3. A warning legend will appear indicating to update the spells by running dw update-spells, which it's oudated

Expected behavior
The legend shown when not updating the spells for more than 30 days should show the correct command to update the grimoires: dw spell update

Screenshots

Desktop (please complete the following information):

• OS: macOS Ventura
• Version 13.6 (22G120)
• DW-CLI version: (Command Line : V1.0.34 / Runtime : V2.6.0-SNAPSHOT)