Ensure latest version of style is used after slicer.org or download.slicer.org deployement

[jcfr]

Following the integration of https://github.com/Slicer/slicer.org/pull/136, I observed that the website needed a "hard refresh" to properly display the icon.

This is because the style was modified and we don't have "cache busting" mechanism in place.

Proposed solution

See https://murfitt.net/blog/cache-busting-with-jekyll

cc: @jamesobutler @lassoan @pieper

[pieper]

Personally I think this was a small enough issue and rare enough that we don't need to implement a special workaround. We don't really plan on changing this content much.

[jamesobutler]

@jcfr was it "hard refreshed" based on https://github.com/Slicer/slicer.org/commit/02bb08e8ee675da195dec08ab79e02b66b6cb871? It currently doesn't seem to include changes from https://github.com/Slicer/slicer.org/commit/aa6ed1923be914dae5839db73e8966bfd4e85128 as the site currently looks like https://github.com/Slicer/slicer.org/pull/136#issuecomment-1031377116.

[jcfr]

If you look the bottom of the page, it includes the following:

This means that the html is the correct one as it based of https://github.com/Slicer/slicer.org/commit/d5fd015

But as you correctly observed the style currently in the cache is the one being used, and this explained what you experienced.