[#56] Update action-slack

.github/workflows/slack-mainline.yml

@@ -2,43 +2,42 @@ name: Slack Mainline
 on:
   push:
     branches:
-      - master
+      - v3
-      - v2
 
 jobs:
   notification:
     runs-on: ubuntu-latest
     steps:
       - name: Succeeded Check
-        uses: 8398a7/action-slack@v2
+        uses: 8398a7/action-slack@v3
         with:
           status: success
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           SLACK_WEBHOOK_URL: ${{ secrets.SLACK_WEBHOOK_URL_FOR_INTEGRATION_TEST }}
       - name: Failed Check
-        uses: 8398a7/action-slack@v2
+        uses: 8398a7/action-slack@v3
         with:
           status: failure
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           SLACK_WEBHOOK_URL: ${{ secrets.SLACK_WEBHOOK_URL_FOR_INTEGRATION_TEST }}
       - name: Cancelled Check
-        uses: 8398a7/action-slack@v2
+        uses: 8398a7/action-slack@v3
         with:
           status: cancelled
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           SLACK_WEBHOOK_URL: ${{ secrets.SLACK_WEBHOOK_URL_FOR_INTEGRATION_TEST }}
       - name: Check
-        uses: 8398a7/action-slack@v2
+        uses: 8398a7/action-slack@v3
         with:
           status: ${{ job.status }}
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           SLACK_WEBHOOK_URL: ${{ secrets.SLACK_WEBHOOK_URL_FOR_INTEGRATION_TEST }}
       - name: Legacy Check
-        uses: 8398a7/action-slack@v2
+        uses: 8398a7/action-slack@v3
         with:
           status: ${{ job.status }}
           username: legacy user
@@ -47,10 +46,10 @@ jobs:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           SLACK_WEBHOOK_URL: ${{ secrets.SLACK_LEGACY_WEBHOOK_URL_FOR_INTEGRATION_TEST }}
       - name: Custom Field Check
-        uses: 8398a7/action-slack@v2
+        uses: 8398a7/action-slack@v3
         with:
           status: custom
-          payload: |
+          custom_payload: |
             {
               text: "Custom Field Check",
               attachments: [{
@@ -82,7 +81,7 @@ jobs:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           SLACK_WEBHOOK_URL: ${{ secrets.SLACK_WEBHOOK_URL_FOR_INTEGRATION_TEST }}
       - name: Check
-        uses: 8398a7/action-slack@v2
+        uses: 8398a7/action-slack@v3
         with:
           status: ${{ job.status }}
         env: