Fix near.org developer section

[thisisjoshford]

Re-rollout of near.org is scheduled to take place 10/8/21. Update developer section and make edits to Wordpress staging site.

• [x] https://near.flywheelstaging.com/developers/
• [x] https://near.flywheelstaging.com/developer-tools
• [x] https://near.flywheelstaging.com/bridge/
• [x] https://near.flywheelstaging.com/bounties/
• [x] https://near.flywheelstaging.com/office-hours/

Tracking here: https://trello.com/b/CZM9gKp9/website-re-rollout