chore(workflows): updating new comment workflow (#1667)

Fixing issue when the new comment had multilines that resulted in multiple messages posted.
This was done by calling toJson in order to escape special characters (such as line breaks)

Author: sebaland

.github/workflows/issue_comment.yml

@@ -23,5 +23,6 @@ jobs:
       - name: Run webhook curl command
         env:
           WEBHOOK_URL: ${{ secrets.SLACK_COMMENT_WEBHOOK_URL }}
+          BODY: ${{toJson(github.event.comment.body)}}
         shell: bash
-        run: echo "${{github.event.comment.body}}" | sed -e "s/[\`\'\"]/ /g" | xargs -I {} curl -s POST "$WEBHOOK_URL" -H "Content-Type:application/json" --data '{"comment":"{}", "commentUrl":"${{github.event.comment.html_url}}", "user":"${{github.event.comment.user.login}}"}'
+        run: echo $BODY | xargs -I {} curl -s POST "$WEBHOOK_URL" -H "Content-Type:application/json" --data '{"comment":"{}", "commentUrl":"${{github.event.comment.html_url}}", "user":"${{github.event.comment.user.login}}"}'