UI tweaks and small bug fix-a-palooza

[benjaminsampica]

• The new Change Log dashboard item has two sections. Since it’s called “Change Logs”, the wording of “Released Changes/Planned Changes” is redundant. “Released/Planned” is cool.
• Some of the headers aren’t using the internal header component and have wonky spacing.
• Change Log “tell us!” Looks bad on mobile.
• The accordion on the Rules page doesn’t open/close correctly if moving to the next item before closing the current one.
• First-time or returning contributors on the repo cannot have a successful build because of pipeline permissioning. See here for a fix.