Get jupyter-myst-build-proxy from conda-forge#38

mfisher87 merged 1 commit intomaingeojupyter/workshop-open-source-geospatial:mainfrom

set-jupyter-myst-build-proxy-postbuildgeojupyter/workshop-open-source-geospatial:set-jupyter-myst-build-proxy-postbuildCopy head branch name to clipboard