.github/workflows/Labeler.yml: Update workflows

[makubacki]

Updates github/issue-labeler from v2.5 to v3.1.

Includes the following fixes (occassionally impacting Mu PRs):

• Issue labels that do not match a regex will no longer be removed
• Support empty body and only remove existing labels

---

Updates actions/labeler from v4 to v4.1.0.

No major known changes that impact Mu DevOps.

[makubacki]

Tested on my mu_oem_sample fork here: https://github.com/makubacki/mu_oem_sample/pull/4