CI: label check fails if a bug label is assigned to PR

[RolandSherwin]

The output from a failed run, when bug label was included.

 LABELS=$(echo '[
    {
      "color": "d73a4a",
      "default": true,
      "description": "Something isn't working",
      "id": 5267599031,
      "name": "bug",
      "node_id": "LA_kwDOJJwJ-M8AAAABOfkutw",
      "url": "https://api.github.com/repos/maidsafe/safe_network/labels/bug"
    },
    {
      "color": "c90076",
      "default": false,
      "description": "Pull request is large",
      "id": 5308799389,
      "name": "large",
      "node_id": "LA_kwDOJJwJ-M8AAAABPG3ZnQ",
      "url": "https://api.github.com/repos/maidsafe/safe_network/labels/large"
    }
  ]' | jq -r '.[].name')
  echo -e "This PR has the following Labels:\n$LABELS"
  if [[ $LABELS == *"DoNotMerge"* ]]; then
    echo "This PR is labeled as DoNotMerge!"
    exit 1
  fi
  shell: /usr/bin/bash -e {0}
/home/runner/work/_temp/a11aa1e7-947e-4086-9341-3cc480257a77.sh: line 23: unexpected EOF while looking for matching `"'
Error: Process completed with exit code 2.