Fix crew name/number

[mcshane-fire]

Found four ad_format files that need crew name changes to match bumps charts. Here are the changes and the information used that supports this change:

• Eights 2022 Men: Mansfield 3 -> Mansfield 2 (http://eodg.atm.ox.ac.uk/user/dudhia/rowing/eights/e22fin.html)
• Eights 2022 Women: Chirst Church 3 -> Christ Church 3 (http://eodg.atm.ox.ac.uk/user/dudhia/rowing/eights/e22fin.html)
• Lents 2023 Men: Clare Hall 2 - Clare Hall (http://www.cucbc.org/bumps/results/26/1)
• Torpids 1969 Men: Merton 3 -> Merton 2 (https://eodg.atm.ox.ac.uk/user/dudhia/rowing/bumps/t1969/)