Fixed a typo (#1701)

* corrected a typo

Signed-off-by: kiranscaria <kiranscaria@outlook.com>

* corrected a typo

Signed-off-by: kiranscaria <kiranscaria@outlook.com>

Author: kiranscaria

intermediate_source/torchvision_tutorial.rst

@@ -220,7 +220,7 @@ way of doing it:
    import torchvision
    from torchvision.models.detection.faster_rcnn import FastRCNNPredictor
 
-   # load a model pre-trained pre-trained on COCO
+   # load a model pre-trained on COCO
    model = torchvision.models.detection.fasterrcnn_resnet50_fpn(pretrained=True)
 
    # replace the classifier with a new one, that has
@@ -290,7 +290,7 @@ be using Mask R-CNN:
 
 
    def get_model_instance_segmentation(num_classes):
-       # load an instance segmentation model pre-trained pre-trained on COCO
+       # load an instance segmentation model pre-trained on COCO
        model = torchvision.models.detection.maskrcnn_resnet50_fpn(pretrained=True)
 
        # get number of input features for the classifier