docs(netlify-example/brush/index.html): Fixes a typo which throws an error in the BrushTool example (#1377)
docs(netlify-example/brush/index.html): Fixes a typo which throws an error in the BrushTool example (#1377)


chafey/cornerstoneTools,cornerstonejs/cornerstoneTools,cornerstonejs/cornerstoneTools,cornerstonejs/cornerstoneTools