(maint) Update label sync workflow

There have been some upstream changes to the label sync workflow
and I want to make sure that they are the same here.

Author: gep13

.github/workflows/label-sync.yml

@@ -5,24 +5,25 @@ on:
     # Run at the end of the day (most likely UTC)
     - cron: "0 0 * * *"
   push:
-    branches:
-      - "master"
     paths:
-      - ".github/labels.yml"
+      - '.github/workflows/label-sync.yml'
+      - '.github/labels.yml'
 
 jobs:
   labels:
     # We use ubuntu as the image, as it is typically faster and cheaper (on private repos).
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/[email protected]
-      - uses: EndBug/[email protected]
+      - uses: actions/checkout@v4
+        with:
+          sparse-checkout: .github/labels.yml
+      - uses: EndBug/label-sync@v2
         with:
           config-file: |
             https://raw.githubusercontent.com/chocolatey/.github/master/.github/labels.yml
             .github/labels.yml
           request-token: ${{ secrets.SYNC_TOKEN }} # Used when getting the config files.
-          delete-other-labels: true
+          delete-other-labels: true # After initial run, and verification change this to true
           dry-run: false
-          token: ${{ secrets.SYNC_TOKEN }} # Used when updating the lables on the repository
+          token: ${{ secrets.SYNC_TOKEN }} # Used when updating the labels on the repository.