2.5.1rc2: bug fixes and document updates

What's Changed

• [2.5] Update finance end to end README and images by @YuanTingHsieh in #3013
• [2.5] Fix fobs issue by @YuanTingHsieh in #3015
• [2.5] Fix fobs doc (#3012) by @YuanTingHsieh in #3016
• [2.5] Update version and python requires by @IsaacYangSLA in #3024
• [2.5] Fix PTModel optional arguments by @SYangster in #3026
• [2.5] Set numpy less than 2.0.0 by @YuanTingHsieh in #3027
• [2.5] Fedbpt fix by @holgerroth in #3030
• [2.5] split learning: upgrade openmined-psi to 2.0.5 by @chesterxgchen in #3019
• [2.5] Cherry-pick Fixed broken doc ref to 'helm_chart' (#3022) [skip ci] by @YuanTingHsieh in #3032

Full Changelog: 2.5.1rc1...2.5.1rc2