Opportunity page updates

[Dahianna]

Description

Update opportunity page

Fixes #451

Checklist

• [ ] My code follows the existing style, code structure, and naming taxonomy
• [ ] I have performed a self-review of my own code and have no open issues
• [ ] I have commented my code, particularly in hard-to-understand areas
• [ ] My changes generate no new warnings or syntax errors
• [ ] I have verified Draft on actual mobile devices, especially Safari-based

[Dahianna]

Removed "Founded with an inaugural cohort of 38 Fellows in June 2022, the Digital Corps will scale significantly in subsequent years." line