(2) Update aerials thumbnail images

[rmjaffe]

Describe the bug

The thumbnails on a handful of the aerials flights need to be updated to show the first child work. Includes:

1967-A 1967-C 1967-B 1967-E 1967-M 1967-K 1968-D 1968-A 1968-B 1969-A 1969-B 1969-C 1969-D 1969-G

Acceptance criteria

Done means:

• [ ] Thumbnails match first child works

[snehagunduraoUL]

@rmjaffe all the thumbnails have been updated to show respective first child work. https://digitalcollections.library.ucsc.edu/collections/5t34sp24c

[rmjaffe]

Looks good! Thank you