types/types: Correct docstring typo for (PortBinding)FromString
types/types: Correct docstring typo for (PortBinding)FromString

Signed-off-by: Euan Harris <c3b6e83069c8e9e3af49a38fec6026be89559638@docker.com>

trebonian/docker,nalind/docker,nawawi/docker,jameszhan/docker,cpuguy83/docker,mahak/docker,trebonian/docker,docker/docker,flavio/docker,djs55/docker,thaJeztah/docker,Mokolea/docker,konstruktoid/docker-upstream,bearstech/moby,moby/moby,yosifkit/docker,moul/docker,nalind/docker,jimjag/docker,flavio/docker,trebonian/docker,flavio/docker,gnailuy/docker,vdemeester/docker,konstruktoid/docker-upstream,djs55/docker,cpuguy83/docker,Ramzec/docker,jimjag/docker,gnailuy/docker,AkihiroSuda/docker,vdemeester/docker,flavio/docker,jameszhan/docker,mahak/docker,paralin/docker,jameszhan/docker,konstruktoid/docker-upstream,AkihiroSuda/docker,AkihiroSuda/docker,moul/docker,mahak/docker,thaJeztah/docker,cpuguy83/docker,docker/docker,jthelin/docker,Ramzec/docker,Ramzec/docker,djs55/docker,nalind/docker,yosifkit/docker,moul/docker,AkihiroSuda/docker,nalind/docker,yosifkit/docker,jimjag/docker,mahak/docker,moby/moby,thaJeztah/docker,bearstech/moby,Ramzec/docker,Mokolea/docker,paralin/docker,bearstech/moby,thaJeztah/docker,Mokolea/docker,paralin/docker,jimjag/docker,Mokolea/docker,cpuguy83/docker,nawawi/docker,vdemeester/docker,jthelin/docker,gnailuy/docker,bearstech/moby,nawawi/docker,nawawi/docker,trebonian/docker,yosifkit/docker,docker/docker,moul/docker,paralin/docker,moby/moby,gnailuy/docker,konstruktoid/docker-upstream,moby/moby