ci: use v0.4.0

Author: realstealthninja

.github/workflows/approved-label.yml

@@ -6,7 +6,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Add "approved" label when approved
-      uses: realstealthninja/label-when-approved
+      uses: realstealthninja/label-when-approved@0.4.0
       env:
         requiredApproves: 1
         secret: ${{ secrets.GITHUB_TOKEN }}