Update preset map for VGG model (#2411)

* Update preset map for VGG model

* Update preset map for VGG model

Author: sonali-kumari1

tools/checkpoint_conversion/convert_vgg_checkpoints.py

@@ -3,7 +3,7 @@
 Optionally uploads the model to Keras if the `--upload_uri` flag is passed.
 
 python tools/checkpoint_conversion/convert_vgg_checkpoints.py \
-    --preset vgg11 --upload_uri kaggle://kerashub/vgg/keras/vgg11
+    --preset vgg_11_imagenet --upload_uri kaggle://kerashub/vgg/keras/vgg_11_imagenet
 """
 
 import os
@@ -20,10 +20,10 @@
 import keras_hub
 
 PRESET_MAP = {
-    "vgg11": "timm/vgg11.tv_in1k",
-    "vgg13": "timm/vgg13.tv_in1k",
-    "vgg16": "timm/vgg16.tv_in1k",
-    "vgg19": "timm/vgg19.tv_in1k",
+    "vgg_11_imagenet": "timm/vgg11.tv_in1k",
+    "vgg_13_imagenet": "timm/vgg13.tv_in1k",
+    "vgg_16_imagenet": "timm/vgg16.tv_in1k",
+    "vgg_19_imagenet": "timm/vgg19.tv_in1k",
     # TODO(jeffcarp): Add BN variants.
 }