Update Help Wanted to Open Tasks

[saracope]

Summary

🔎Preview

This PR fixes/implements the following bugs/features

• [x] In the main nav, change Developers -> Contribute to Open Tasks
• [x] Update the url for Help Wanted from /help-wanted to /open-tasks
• [x] Updates route, config examples, faq's, and mobile menu

Create a more consistent experience for the users

Test plan (required)

BEFORE

AFTER

Code formatting

Closing issues

Fixes #683

[saracope]

Also tagging @jlow81 for review.

[saracope]

Navigation - Under Developers, change Contribute to Open Tasks #Sprint_39