Add new KerasHub guides to guides_master (#1972)

Author: divyashreepathihalli

scripts/guides_master.py

@@ -59,6 +59,22 @@
     "title": "KerasHub",
     "toc": True,
     "children": [
+        {
+            "path": "getting_started",
+            "title": "Getting Started with KerasHub",
+        },
+        {
+            "path": "Semantic Segmentation with KerasHub",
+            "title": "semantic_segmentation_deeplab_v3",
+        },
+        {
+            "path": "trasnformer_pretraining",
+            "title": "Pretraining a Transformer from scratch with KerasHub",
+        },
+        {
+            "path": "upload",
+            "title": "Uploading Models with KerasHub",
+        },
         {
             "path": "classification_with_keras_hub",
             "title": "Classification with KerasHub",