(PE-11025) Add support section to README.md
(PE-11025) Add support section to README.md

This commit adds a support section to the README.md.

camlow325/clj-http-client,rlinehan/clj-http-client,rlinehan/clj-http-client,dmcpl/clj-http-client,dmcpl/clj-http-client,puppetlabs/clj-http-client,camlow325/clj-http-client,puppetlabs/clj-http-client