Disable spotless on tag

[lemeurherve]

Description

This PR disable spotless check when building a tag to avoid the following error:

[ERROR] Failed to execute goal com.diffplug.spotless:spotless-maven-plugin:2.43.0:check (default) on project plugin-health-scoring-parent: Execution default of goal com.diffplug.spotless:spotless-maven-plugin:2.43.0:check failed: No such reference 'origin/main' -> [Help 1]

Testing done

Tested with a replay of the v3.7.1 tag build on infra.ci.jenkins.io: https://infra.ci.jenkins.io/job/docker-jobs/job/plugin-health-scoring/view/tags/job/v3.7.1/8/console

### Submitter checklist
- [x] If an issue exists, it is well described and linked in the description
- [x] The description of this pull request is detailed and explain why this pull request is needed
- [ ] The changeset is on a specific branch. Using `feature/` for new feature, or improvements ; Using `fix/` for bug fixes ; Using `docs/` for any documentation changes.
- [ ] If required, the documentation has been updated
- [x] There is automated tests to cover the code change / addition or an explanation why there is no tests in the description.

[lemeurherve]

Arg the merge queue has its own quirk and failed with the same error, but on ci.jenkins.io this time 😓

@alecharp does this merge queue is needed? Has it been useful?

[alecharp]

Merge queue was useful for dependency updates but it stopped working last week or so..

[lemeurherve]

Merge queue was useful for dependency updates but it stopped working last week or so..

Due to this error?

[alecharp]

yes.