fix: upgrade action versions to support Node.js 24

- Upgrade github/issue-labeler from v3.4 to v4 (Node.js 24 compatible)
- Upgrade JasonEtco/is-sponsor-label-action from v3 to v2 (v3 does not exist)

Fixes:
- Unable to resolve action `jasonetco/is-sponsor-label-action@v3`
- Node.js 20 deprecation for github/issue-labeler@v3.4

Author: dgibbs64

.github/workflows/labeler.yml

@@ -25,7 +25,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Issue Labeler
-        uses: github/issue-labeler@v3.4
+        uses: github/issue-labeler@v4
         with:
           repo-token: "${{ secrets.GITHUB_TOKEN }}"
           configuration-path: .github/labeler.yml
@@ -38,7 +38,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: PR Labeler
-        uses: github/issue-labeler@v3.4
+        uses: github/issue-labeler@v4
         with:
           repo-token: "${{ secrets.GITHUB_TOKEN }}"
           configuration-path: .github/labeler.yml
@@ -53,6 +53,6 @@ jobs:
     steps:
       - name: Is Sponsor Label
         if: github.event.action == 'opened'
-        uses: JasonEtco/is-sponsor-label-action@v3
+        uses: JasonEtco/is-sponsor-label-action@v2
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}