chore: upgrade deprecated Node.js 20 actions to Node.js 24 compatible versions

- upgrade github/issue-labeler from v3.4 to v4
- upgrade JasonEtco/is-sponsor-label-action from v2 to v3
- resolves deprecation warnings for Node.js 20 actions
- maintains compatibility with Node.js 24 runner default (June 2, 2026)

Author: dgibbs64

.github/workflows/labeler.yml

@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Issue Labeler
-        uses: github/issue-labeler@v3.4
+        uses: github/issue-labeler@v4
         with:
           repo-token: "${{ secrets.GITHUB_TOKEN }}"
           configuration-path: .github/labeler.yml
@@ -27,6 +27,6 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Is Sponsor Label
-        uses: JasonEtco/is-sponsor-label-action@v2
+        uses: JasonEtco/is-sponsor-label-action@v3
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}