Fix: Changed z-index of navigation to bring it to forefront

[JTSchwartz]

Describe your PR

Page title and navigation were on the same z-index. Bumping the z-index of the navigation up by one resolves the issue and no further problematic interactions can be found

Fixes #304

Pages/Interfaces that will change

All pages with navigation on small (mobile) displays

Screenshots / video of changes

Steps to test

1. Open on a phone (or in the dev tools device emulator) 2.) Click on hamburger menu icon

[netlify[bot]]

Deploy request for rebuild-black-business accepted.

Accepted with commit eeda2a24ed0edbd852936f751d42e59ee388b1c5

https://app.netlify.com/sites/rebuild-black-business/deploys/5f124d31916c6f000749cf0a

[ifyoumakeit]

This is probably due to my z-index changes in #301, glad this was caught / fixed!