fix typo grid.md (#24757)
fix typo grid.md (#24757)

fixes #24744
bardiharborow/bootstrap,fschumann1211/bootstrap,inway/bootstrap,SweetProcess/bootstrap,bootstrapbrasil/bootstrap,bootstrapbrasil/bootstrap,tjkohli/bootstrap,janseliger/bootstrap,tagliala/bootstrap,SweetProcess/bootstrap,nice-fungal/bootstrap,peterblazejewicz/bootstrap,tagliala/bootstrap,fschumann1211/bootstrap,vsn4ik/bootstrap,supergibbs/bootstrap,bardiharborow/bootstrap,yuyokk/bootstrap,tagliala/bootstrap,kvlsrg/bootstrap,vsn4ik/bootstrap,coliff/bootstrap,joblocal/bootstrap,janseliger/bootstrap,janseliger/bootstrap,twbs/bootstrap,twbs/bootstrap,bardiharborow/bootstrap,m5o/bootstrap,creativewebjp/bootstrap,9-chirno/chirno,creativewebjp/bootstrap,vsn4ik/bootstrap,Lyricalz/bootstrap,stanwmusic/bootstrap,gijsbotje/bootstrap,zalog/bootstrap,janseliger/bootstrap,kvlsrg/bootstrap,peterblazejewicz/bootstrap,gijsbotje/bootstrap,kvlsrg/bootstrap,Lyricalz/bootstrap,supergibbs/bootstrap,Hemphill/bootstrap-docs,creativewebjp/bootstrap,9-chirno/chirno,stanwmusic/bootstrap,Hemphill/bootstrap-docs,SweetProcess/bootstrap,tjkohli/bootstrap,seanwu99/bootstrap,stanwmusic/bootstrap,vsn4ik/bootstrap,GerHobbelt/bootstrap,fschumann1211/bootstrap,joblocal/bootstrap,gijsbotje/bootstrap,seanwu99/bootstrap,joblocal/bootstrap,seanwu99/bootstrap,seanwu99/bootstrap,creativewebjp/bootstrap,supergibbs/bootstrap,Lyricalz/bootstrap,Hemphill/bootstrap-docs,yuyokk/bootstrap,9-chirno/chirno,m5o/bootstrap,nice-fungal/bootstrap,yuyokk/bootstrap,joblocal/bootstrap,inway/bootstrap,coliff/bootstrap,9-chirno/chirno,bardiharborow/bootstrap,supergibbs/bootstrap,zalog/bootstrap,stanwmusic/bootstrap,gijsbotje/bootstrap,inway/bootstrap,SweetProcess/bootstrap,GerHobbelt/bootstrap,Hemphill/bootstrap-docs,zalog/bootstrap,Lyricalz/bootstrap,bootstrapbrasil/bootstrap,nice-fungal/bootstrap,fschumann1211/bootstrap,GerHobbelt/bootstrap,peterblazejewicz/bootstrap,yuyokk/bootstrap