bump middleman-hashicorp to 0.3.40 and exclude guide rendering (#5847)
bump middleman-hashicorp to 0.3.40 and exclude guide rendering (#5847)

* bump middleman-hashicorp to 0.3.40 and exclude guide rendering

* add notes to Makefile for volume mounts hack PR#5847

* make note of the PR number in the comment

kingland/consul,kingland/consul,scalp42/consul,42wim/consul,kingland/consul,42wim/consul,scalp42/consul,kingland/consul,hashicorp/consul,scalp42/consul,scalp42/consul,hashicorp/consul,hashicorp/consul,42wim/consul,hashicorp/consul,scalp42/consul,42wim/consul,42wim/consul,kingland/consul