Site menu links missing trailing slash /

[patphongs]

Summary

The website's mega menu is missing trailing slashes in the links, which causes a redirect (301). We want to avoid the additional hop by correcting the links to have the trailing slash.

The menus are located in these templates: https://github.com/fecgov/fec-cms/tree/develop/fec/fec/templates/partials/navigation