Remove commit message from faas-cli version

Changelog for 0.12.23:

• PR #854 Remove Swarm support from faas-cli by @alexellis
• PR #855 docs: fix overwrite command by @Thiry1

Commits
356b913 Remove commit message from faas-cli version by @alexellis
88a6baf Update docs for swarm registries by @alexellis
e5b971a Remove Swarm support from faas-cli by @alexellis
dc39134 docs: fix overwrite command by @Thiry1

Generated by Derek