Update labels config

Author: taiki-kuraishi

.github/workflows/label-sync.yaml

@@ -3,16 +3,16 @@ name: Label Sync
 on:
   push:
     branches: [init]
-    paths:
-      - .github/labels.json
 
 jobs:
   label-sync:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@1.0.0
-      - uses: lannonbr/issue-label-manager-action@4.0.0
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      - name: Check out code
+        uses: actions/checkout@v2
+
+      - name: Sync labels
+        uses: lannonbr/issue-label-manager-action@2.0.0
         with:
-          delete: true
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          file: .github/labels.json