A breaking change was made in the 3.2.1 release of the "actions/upload-artifact" action, without doing a major version
bump as would be done in a responsibly maintained project. The action now defaults to not uploading "hidden" files.

This project's "Check Go Dependencies" workflow uses the "Licensed" tool to check for incompatible dependency licenses.
The dependencies license metadata cache used by Licensed is stored in a folder named `.licensed`.

In order to facilitate updates, the workflow uploads the generated dependencies license metadata cache as a workflow
artifact when the current cache is found to be outdated.

The `.` at the start of the `.licensed` folder name causes it to now not be uploaded to the workflow artifact. In order
to catch such problems, the workflow configures the "actions/upload-artifact" action to fail if no files were uploaded.
So in addition to not uploading the artifact, the change in the "actions/upload-artifact" action's behavior also
resulted in the workflow runs failing:

Error: No files were found with the provided path: .licenses/. No artifacts will be uploaded.

The problem is fixed by disabling the "actions/upload-artifact" action's new behavior via the `include-hidden-files`
input. After this change, the workflow can once more upload the dependencies license metadata cache to a workflow
artifact as needed.

Configure actions/upload-artifact action to upload required hidden files

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 3 to 4.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v3...v4)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 3 to 4.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v3...v4)

---
updated-dependencies:
- dependency-name: actions/download-artifact
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Bumps [geekyeggo/delete-artifact](https://github.com/geekyeggo/delete-artifact) from 2 to 5.
- [Release notes](https://github.com/geekyeggo/delete-artifact/releases)
- [Changelog](https://github.com/GeekyEggo/delete-artifact/blob/main/CHANGELOG.md)
- [Commits](GeekyEggo/delete-artifact@v2...v5)

---
updated-dependencies:
- dependency-name: geekyeggo/delete-artifact
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

The "Sync Labels" GitHub Actions workflow is configured to allow the use of multiple shared label configuration files.
This is done by using a job matrix in the GitHub Actions workflow to download each of the files from the source
repository in a parallel GitHub Actions workflow job. A GitHub Actions workflow artifact was used to transfer the
generated files between sequential jobs in the workflow. The "actions/upload-artifact" and "actions/download-artifact"
actions are used for this purpose.

Previously, a single artifact was used for the transfer of all the shared label configuration files, with each of the
parallel jobs uploading its own generated files to that artifact. However, support for uploading multiple times to a
single artifact was dropped in version 4.0.0 of the "actions/upload-artifact" action. So it is now necessary to use a
dedicated artifact for each of the builds. These can be downloaded in aggregate by using the artifact name globbing and
merging features which were introduced in version 4.1.0 of the "actions/download-artifact" action.

…/upload-artifact-4

Bump actions/upload-artifact from 3 to 4