Visualization page doesn't exist

[christinabergmann]

Clicking on meta-analytic visualization leads nowhere :(

[amsan7]

so there was a tinyy typo that's fixed here: https://github.com/langcog/metalab2/commit/df429dc9dcbf2e6d8f023246421621746f0721d6. @mllewis just a reminder that these things complain for everything :p