Fix go get path in CLIPR dev documentation
Fix go get path in CLIPR dev documentation

We use code.cloudfoundry.org so that we can switch up the location of the git repo in the future without needing to change import paths in the code. The change to use code.cloudfoundry.org was done a while ago; this change is to update the docs.

cloudfoundry-incubator/cli-plugin-repo,cloudfoundry-incubator/cli-plugin-repo,cloudfoundry-incubator/cli-plugin-repo,cloudfoundry-incubator/cli-plugin-repo,kkellner/cli-plugin-repo,kkellner/cli-plugin-repo,kkellner/cli-plugin-repo