feat: Updated for Bolivian holidays

[jhordyess]

• Included substitute holidays
• Added the most commonly observed days
• Removed Easter Sunday, Ascension Day, and Agrarian Reform Day
• Updated with commonly used names
• Added state-specific holidays

[commenthol]

Hi @jhordyess, Great work, thanks a lot. Could you please change the source linking and attributions?

[jhordyess]

Sure, I'll update the source linking and attributions.