ReadMe: Link to shared Code of Conduct in TOB repo
ReadMe: Link to shared Code of Conduct in TOB repo

Signed-off-by: Rob Dolin <c94deee67284244efebd7d9c5825bcff80d2bbc2@microsoft.com>
vbatts/specs,wking/opencontainer-runtime-spec,hqhq/specs,jonboulle/specs,cloudfoundry-incubator/specs,opencontainers/specs,laijs/specs,ujuc/specs,wking/opencontainer-specs,opencontainers/runtime-spec,hqhq/runtime-spec