Fix how to change connection pool for rails 6 (#16158)
Fix how to change connection pool for rails 6 (#16158)

* Fix how to change connection pool for rails 6

* Fix to match the code elsewhere
gol-cha/mastodon,yi0713/mastodon,abcang/mastodon,MitarashiDango/mastodon,koba-lab/mastodon,tootsuite/mastodon,tootcafe/mastodon,ikuradon/mastodon,masto-donte-com-br/mastodon,imas/mastodon,yukimochi/mastodon,MitarashiDango/mastodon,tootsuite/mastodon,maa123/mastodon,glitch-soc/mastodon,Kirishima21/mastodon,ykzts/mastodon,lindwurm/mastodon,pinfort/mastodon,masto-donte-com-br/mastodon,Kirishima21/mastodon,yukimochi/mastodon,cobodo/mastodon,ikuradon/mastodon,im-in-space/mastodon,pinfort/mastodon,Ryanaka/mastodon,glitch-soc/mastodon,theoria24/mastodon,Nyoho/mastodon,koba-lab/mastodon,lynlynlynx/mastodon,ykzts/mastodon,im-in-space/mastodon,musashino205/mastodon,lindwurm/mastodon,primenumber/mastodon,masto-donte-com-br/mastodon,primenumber/mastodon,Ryanaka/mastodon,abcang/mastodon,im-in-space/mastodon,koba-lab/mastodon,theoria24/mastodon,Kirishima21/mastodon,MitarashiDango/mastodon,gol-cha/mastodon,ikuradon/mastodon,imas/mastodon,musashino205/mastodon,musashino205/mastodon,yukimochi/mastodon,cobodo/mastodon,tootsuite/mastodon,Ryanaka/mastodon,h3zjp/mastodon,pinfort/mastodon,maa123/mastodon,MitarashiDango/mastodon,gol-cha/mastodon,Nyoho/mastodon,lynlynlynx/mastodon,tootcafe/mastodon,maa123/mastodon,abcang/mastodon,theoria24/mastodon,tootcafe/mastodon,yukimochi/mastodon,lynlynlynx/mastodon,pinfort/mastodon,Nyoho/mastodon,h3zjp/mastodon,ykzts/mastodon,masto-donte-com-br/mastodon,Kirishima21/mastodon,maa123/mastodon,cobodo/mastodon,h3zjp/mastodon,ykzts/mastodon,gol-cha/mastodon,lindwurm/mastodon,yi0713/mastodon,primenumber/mastodon,imas/mastodon,imas/mastodon,primenumber/mastodon,Ryanaka/mastodon,abcang/mastodon,yi0713/mastodon,musashino205/mastodon,yi0713/mastodon,lindwurm/mastodon,glitch-soc/mastodon,h3zjp/mastodon,Nyoho/mastodon,lynlynlynx/mastodon,theoria24/mastodon,ikuradon/mastodon,tootcafe/mastodon,cobodo/mastodon,im-in-space/mastodon,koba-lab/mastodon,tootsuite/mastodon,glitch-soc/mastodon