Update runmetrics.md - fix broken link
Update runmetrics.md - fix broken link

Fix link to correct anchor, add space.
londoncalling/docker.github.io,anweiss/docker.github.io,thaJeztah/docker.github.io,anweiss/docker.github.io,thaJeztah/docker.github.io,JimGalasyn/docker.github.io,docker/docker.github.io,londoncalling/docker.github.io,anweiss/docker.github.io,johnstep/docker.github.io,anweiss/docker.github.io,docker/docker.github.io,JimGalasyn/docker.github.io,thaJeztah/docker.github.io,docker/docker.github.io,anweiss/docker.github.io,johnstep/docker.github.io,johnstep/docker.github.io,JimGalasyn/docker.github.io,JimGalasyn/docker.github.io,londoncalling/docker.github.io,docker/docker.github.io,thaJeztah/docker.github.io,JimGalasyn/docker.github.io,londoncalling/docker.github.io,thaJeztah/docker.github.io,johnstep/docker.github.io,docker/docker.github.io,londoncalling/docker.github.io,johnstep/docker.github.io