Fix typo in PoseNet docs (#223)

body-pix/README.md

@@ -65,7 +65,7 @@ const segmentation = await net.estimatePersonSegmentation(image, outputStride, s
 * **image** - ImageData|HTMLImageElement|HTMLCanvasElement|HTMLVideoElement
   The input image to feed through the network.
 * **outputStride** - the desired stride for the outputs when feeding the image through the model.  Must be 32, 16, 8.  Defaults to 16.  The higher the number, the faster the performance but slower the accuracy, and visa versa.
-* **segmentationTreshold** - Must be between 0 and 1. For each pixel, the model estimates a score between 0 and 1 that indicates how confident it is that part of a person is displayed in that pixel.  This *segmentationThreshold* is used to convert these values
+* **segmentationThreshold** - Must be between 0 and 1. For each pixel, the model estimates a score between 0 and 1 that indicates how confident it is that part of a person is displayed in that pixel.  This *segmentationThreshold* is used to convert these values
 to binary 0 or 1s by determining the minimum value a pixel's score must have to be considered part of a person.  In essence, a higher value will create a tighter crop
 around a person but may result in some pixels being that are part of a person being excluded from the returned segmentation mask.