humanatlas.io UI: standard updates for release cycle

[LibbyUX]

humanatlas.io UI: standard updates for release cycle

Overview pages

• [x] Training & Outreach: Add button card for 7th Release Notes

Dropdown/select updates

Add a default dropdown option displaying the 7th Release for pages with 7th release new/revised data:

• [x] ASCT+B Tables
• [x] VCCF
• [x] FTU Illustrations
• [x] 3D Reference Objects
• [x] OMAPs

Misc

• [x] Update the release notes banner globally for the 7th release (v2.1)
• [x] Update footer to the year 2024

[LibbyUX]

@bhushankhope these look great in the preview. Thanks so much!