Workaround errors on multi-line commit message

by using toJson with fields.

.github/workflows/macos.yml

@@ -56,7 +56,9 @@ jobs:
               "attachments": [{
                 "title": "${{ job.status }}: ${{ github.workflow }} / ${{ matrix.test_task }}",
                 "title_link": "https://github.com/${{ github.repository }}/commit/${{ github.sha }}/checks",
-                "text": "${{ github.repository }}@${{ github.ref }}: <https://github.com/${{ github.repository }}/commit/${{ github.sha }}|${{ github.sha }}>\nby ${{ github.event.head_commit.committer.name }} on ${{ github.event.head_commit.timestamp }}: ${{ github.event.head_commit.message }}",
+                "text": "${{ github.repository }}@${{ github.ref }}: <https://github.com/${{ github.repository }}/commit/${{ github.sha }}|${{ github.sha }}>",
+                "fields": [{ "value": ${{ toJson(github.event.head_commit.message) }}, "short": false }],
+                "footer": "${{ github.event.head_commit.committer.name }} at ${{ github.event.head_commit.timestamp }}",
                 "color": "danger"
               }]
             }

.github/workflows/ubuntu.yml

@@ -59,7 +59,9 @@ jobs:
               "attachments": [{
                 "title": "${{ job.status }}: ${{ github.workflow }} / ${{ matrix.test_task }}",
                 "title_link": "https://github.com/${{ github.repository }}/commit/${{ github.sha }}/checks",
-                "text": "${{ github.repository }}@${{ github.ref }}: <https://github.com/${{ github.repository }}/commit/${{ github.sha }}|${{ github.sha }}>\nby ${{ github.event.head_commit.committer.name }} on ${{ github.event.head_commit.timestamp }}: ${{ github.event.head_commit.message }}",
+                "text": "${{ github.repository }}@${{ github.ref }}: <https://github.com/${{ github.repository }}/commit/${{ github.sha }}|${{ github.sha }}>",
+                "fields": [{ "value": ${{ toJson(github.event.head_commit.message) }}, "short": false }],
+                "footer": "${{ github.event.head_commit.committer.name }} at ${{ github.event.head_commit.timestamp }}",
                 "color": "danger"
               }]
             }

.github/workflows/windows.yml

@@ -60,7 +60,9 @@ jobs:
               "attachments": [{
                 "title": "${{ job.status }}: ${{ github.workflow }} / ${{ matrix.test_task }}",
                 "title_link": "https://github.com/${{ github.repository }}/commit/${{ github.sha }}/checks",
-                "text": "${{ github.repository }}@${{ github.ref }}: <https://github.com/${{ github.repository }}/commit/${{ github.sha }}|${{ github.sha }}>\nby ${{ github.event.head_commit.committer.name }} on ${{ github.event.head_commit.timestamp }}: ${{ github.event.head_commit.message }}",
+                "text": "${{ github.repository }}@${{ github.ref }}: <https://github.com/${{ github.repository }}/commit/${{ github.sha }}|${{ github.sha }}>",
+                "fields": [{ "value": ${{ toJson(github.event.head_commit.message) }}, "short": false }],
+                "footer": "${{ github.event.head_commit.committer.name }} at ${{ github.event.head_commit.timestamp }}",
                 "color": "danger"
               }]
             }