Pin actions/checkout usage to latest 3.x or 4.x as appropriate. These
were previously pointing to `@4` or `@3` which pull in the latest
versions at these tags as they are released, with the potential to break
our workflows if a breaking change or malicious version for either of
these streams are released.
Changing this to a pinned version also means that dependabot will keep
this in the pinend version format (e.g., referencing a SHA) when it
opens a PR to bump the dependency.
Updates #cleanup
Signed-off-by: Mario Minardi <mario@tailscale.com>
This `go get` action has been running very slowly, and I'm pretty sure
it's because we're building gocross on the first `./tool/go` run, and
because we've set `GOPROXY=direct`, it's going directly to GitHub to
fetch all of the gocross dependencies.
Updates #cleanup
Signed-off-by: Will Norris <will@tailscale.com>
