Update guides/source/form_helpers.md
Update guides/source/form_helpers.md

Co-authored-by: Petrik de Heus <b32f3936c414798c131b08482ad06aae6b98a396@deheus.net>
kmcphillips/rails,Erol/rails,MSP-Greg/rails,georgeclaghorn/rails,yahonda/rails,esparta/rails,MSP-Greg/rails,rails/rails,yahonda/rails,MSP-Greg/rails,yawboakye/rails,BlakeWilliams/rails,georgeclaghorn/rails,rails/rails,Edouard-chin/rails,BlakeWilliams/rails,rails/rails,yawboakye/rails,yawboakye/rails,Erol/rails,yahonda/rails,esparta/rails,georgeclaghorn/rails,kmcphillips/rails,georgeclaghorn/rails,BlakeWilliams/rails,yawboakye/rails,MSP-Greg/rails,Edouard-chin/rails,Erol/rails,kmcphillips/rails,Edouard-chin/rails,esparta/rails,rails/rails,yahonda/rails,Erol/rails,BlakeWilliams/rails,kmcphillips/rails,esparta/rails,Edouard-chin/rails