Large files in gh-pages branch

[scottyhq]

It's not uncommon for rendered HTML versions of notebooks to be large, but it would be great for CI to flag especially large outputs. cc @jomey @ZachKeskinen

This warning is currently buried under the push the commit or tag dropdown in the log https://github.com/snowex-hackweek/website2022/runs/7221242444?check_suite_focus=true

remote: warning: File tutorials/uavsar/2_types_of_uavsar_images.html is 82.99 MB; this is larger than GitHub's recommended maximum file size of 50.00 MB        
[1316](https://github.com/snowex-hackweek/website2022/runs/7221242444?check_suite_focus=true#step:4:1323)
  remote: warning: GH001: Large files detected. You may want to try Git Large File Storage - https://git-lfs.github.com./