Change label for AG reconfigure max_residual

The AG reconfigure screen shows the max_residual default as 0.2 but it's actually 0.5. Please change what is displayed. I think these are the relevant locations:

• https://github.com/Subaru-PFS/PFS_kansoku/blob/master/launcher/PFS_AG.yml#L100
• https://github.com/Subaru-PFS/PFS_kansoku/blob/master/sk/SPEC_ENG/AGRECONF2.sk#L32
• https://github.com/Subaru-PFS/PFS_kansoku/blob/master/sk/SPEC_ENG/AGRECONF2.sk#L151