chore: update GitHub actions to their latest versions

[SirGitsalot]

We're not using any new features from these actions, but the old versions are built on deprecated NodeJS releases.

[SirGitsalot]

With this PR the role tests are not only running* they're actually passing. The full integration test suite is not yet passing, but that looks like it's going to require some changes to the module itself (so not in this PR). The sanity integration test passes the actual tests, but fails on a linter check on the post-test cleanup shell script ¯\(ツ)/¯

*The role tests never actually ran in our GitHub actions(!) The reason they "passed" before is that the test runner uses a glob pattern (molecule/*/molecule.yml) to find its tests. When run at the root of the GitHub action working directory that glob doesn't match anything. The reason the tests started failing recently is that molecule (the aforementioned test runner) was updated to fail if it didn't find any tests.