UE4 docs broke links with UE5 release (#2534)
UE4 docs broke links with UE5 release (#2534)

Had to point the UE4 docs to a specific UE4 release version, as
otherwise the links now 404 with the release of UE5.

Unblocks CI.
googleforgames/agones,googleforgames/agones,googleforgames/agones,googleforgames/agones,googleforgames/agones,googleforgames/agones,googleforgames/agones,googleforgames/agones