master
.github: tidy up the template used when creating a github issue
.github: save ccache only on master pushes to stay within 10 GB limit
actions: update scripting autotest
.github: fix cache key to be unique per board
.github: Unlimit markdown line-length
CONTRIBUTING.md: recommend avoiding duplicate PRs
.github: improve github PR template
.github: convert bare URLs to proper markdown links
.github: Keep Actions up to date with GitHub's Dependabot