docs(samples): fixed comment typo (#182)

Author: Defragger

automl/vision/automlVisionPredict.js

@@ -44,7 +44,7 @@ async function predict(
   // const computeRegion = `region-name, e.g. "us-central1"`;
   // const modelId = `id of the model, e.g. “ICN12345”`;
   // const filePath = `local text file path of content to be classified, e.g. "./resources/test.txt"`;
-  // const scoreThreshold = `value between 0.0 and 1.0, e.g. "0.5"';
+  // const scoreThreshold = `value between 0.0 and 1.0, e.g. "0.5"`;
 
   // Get the full path of the model.
   const modelFullId = client.modelPath(projectId, computeRegion, modelId);