Rollup merge of #32964 - tshepang:comma, r=GuillaumeGomez
Rollup merge of #32964 - tshepang:comma, r=GuillaumeGomez

doc: add missing comma

GBGamer/rust,graydon/rust,graydon/rust,graydon/rust,GBGamer/rust,aidancully/rust,aidancully/rust,GBGamer/rust,graydon/rust,GBGamer/rust,GBGamer/rust,GBGamer/rust,aidancully/rust,graydon/rust,aidancully/rust,aidancully/rust,GBGamer/rust,GBGamer/rust,aidancully/rust,graydon/rust