Merge pull request #1 from matiji66/update-evaluation_protocols

Update evaluation_protocols.md

research/object_detection/g3doc/evaluation_protocols.md

@@ -31,7 +31,7 @@ while for the Weighted PASCAL VOC metric the final mAP value will be influenced
 Similar to pascal voc 2007 detection metric, but computes the intersection over
 union based on the object masks instead of object boxes.
 
-## Weighted PASCAL VOC detection metric
+## Weighted PASCAL VOC instance segmentation metric 
 
 `EvalConfig.metrics_set='weighted_pascal_voc_instance_segmentation_metrics'`