fix(web): center memory lane buttons

[lukashass]

Description

Centers the memory lane buttons, especially on mobile they were way off center.

I also changed the height by 1px to make centering more accurate, hope that's okay.

How Has This Been Tested?

• Manual test in Firefox and Chrome

Screenshots

before	after

Checklist:

• I have performed a self-review of my own code
• I have made corresponding changes to the documentation if applicable
• I have no unrelated changes in the PR.
• I have confirmed that any new dependencies are strictly necessary.
• I have written tests for new code (if applicable)
• I have followed naming conventions/patterns in the surrounding code
• All code in src/services/ uses repositories implementations for database calls, filesystem operations, etc.
• All code in src/repositories/ is pretty basic/simple and does not have any immich specific logic (that belongs in src/services/)

[alextran1502]

Thanks