README.md: contribution about discussion
README.md: contribution about discussion

Leaning on aspects of golang's contribution
(https://golang.org/doc/contribute.html)

Signed-off-by: Vincent Batts <d01a4772f0cffd3f005a7d7f01c59cd104c7a5fe@redhat.com>

runcom/specs,zenlinTechnofreak/specs,mheon/specs,HardikDR/specs,opencontainers/specs,ujuc/specs,vishh/specs,marcosnils/specs,gao-feng/specs,talwai/specs,wangkirin/specs,jonboulle/specs,opencontainers/runtime-spec,hqhq/runtime-spec,navidshaikh/specs,wking/opencontainer-specs,dustymabe/specs,laijs/specs,hqhq/specs,cloudfoundry-incubator/specs,vbatts/specs,wking/opencontainer-runtime-spec,ChengTiesheng/specs