Add linked pull requests for prebuilds and branches in the commit column

[gtsiolis]

Problem to solve

Prebuilds pages added back in #4876 and #4970 didn't include links to PRs near the branch information as described in the relevant specs in #4515.

Prebuilds (Current)	Prebuilds (Specs)

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[gtsiolis]

Reopening this as it's still relevant.