escape special chars in commit messages via pipe

.github/workflows/notify-irc.yaml

@@ -5,9 +5,13 @@ on:
       - master
 jobs:
   notify:
-    name: Send request
+    name: Checkout and notify
     runs-on: ubuntu-latest
     steps:
-      - run: |
-          curl "${{ secrets.IRC_NOTIFY_URL }}" -F target=#gonic -F 'message=push to master (@${{ github.event.head_commit.author.username }}) ${{ github.event.head_commit.message }}' >/dev/null 2>&1
+      - name: Checkout repository
+        uses: actions/checkout@v3
+      - name: Notify
+        run: |
+          set +x e
+          git log -1 --pretty="push to master (@%an) %s" | curl "${{ secrets.IRC_NOTIFY_URL }}" -F target=#gonic -F message=@- >/dev/null 2>&1
           exit 0