docs: fix grammar in security.md [ci-skip]
docs: fix grammar in security.md [ci-skip]

kddeisz/rails,yahonda/rails,georgeclaghorn/rails,lcreid/rails,esparta/rails,Edouard-chin/rails,georgeclaghorn/rails,esparta/rails,Edouard-chin/rails,Vasfed/rails,MSP-Greg/rails,lcreid/rails,betesh/rails,kddeisz/rails,Edouard-chin/rails,Erol/rails,Stellenticket/rails,MSP-Greg/rails,Envek/rails,EmmaB/rails-1,Stellenticket/rails,kmcphillips/rails,Erol/rails,EmmaB/rails-1,kmcphillips/rails,lcreid/rails,joonyou/rails,Envek/rails,yawboakye/rails,BlakeWilliams/rails,yahonda/rails,esparta/rails,BlakeWilliams/rails,kddeisz/rails,yawboakye/rails,yawboakye/rails,Erol/rails,Vasfed/rails,EmmaB/rails-1,bogdanvlviv/rails,joonyou/rails,Stellenticket/rails,rails/rails,Envek/rails,betesh/rails,MSP-Greg/rails,kmcphillips/rails,yawboakye/rails,georgeclaghorn/rails,MSP-Greg/rails,Erol/rails,BlakeWilliams/rails,Envek/rails,BlakeWilliams/rails,Edouard-chin/rails,bogdanvlviv/rails,kddeisz/rails,bogdanvlviv/rails,yahonda/rails,rails/rails,lcreid/rails,georgeclaghorn/rails,rails/rails,rails/rails,bogdanvlviv/rails,betesh/rails,Vasfed/rails,Vasfed/rails,yahonda/rails,esparta/rails,kmcphillips/rails,joonyou/rails,betesh/rails,joonyou/rails,Stellenticket/rails