docs: update CourseGraph README, notably w.r.t. new Tutor plugin#30132

kdmccormick merged 1 commit intokdmccormick/coursegraph-push-on-updateopenedx/openedx-platform:kdmccormick/coursegraph-push-on-updatefrom

kdmccormick/coursegraph-readme-pluginopenedx/openedx-platform:kdmccormick/coursegraph-readme-pluginCopy head branch name to clipboard