Fix SAT mask - Githubissues

Summary

SAT scores should not be comma-separated.

Nav to any institution details page and check SAT score.

[x] My code follows the style guidelines of this project and has no linting errors
[x] I have performed a self-review of my code
[x] I have commented my code, particularly in hard-to-understand areas
[x] I have made corresponding changes to the documentation, including any applicable ADRs
[x] My changes generate no new warnings
[x] I have added tests that fail without these changes
[x] New and existing tests (unit, integration, accessibility) pass locally
[x] Documentation updated
~[ ] If there are security concerns they are addressed or ticketed after being discussed~