Netlify builds tend to fail

[bennypowers]

Description of the issue

Netlify builds will tend to fail, e.g. https://app.netlify.com/teams/patternfly-elements/builds/621e4e78fff2bb000701761a

These types of failures are caused by the netlify runner failing to bust the node_modules cache under various circumstances

possible fixes:

• program the netlify runner to bust the cache on changes to patches/*.diff
• have netlify retry failed builds by clearing the cache first

[bennypowers]

see https://answers.netlify.com/t/automatically-retry-failed-builds-without-cache/52730