Add "new" tags to the left-nav dataset profiling and keras-tuner docs.

PiperOrigin-RevId: 311771130

Author: MarkDaoust

site/en/guide/_toc.yaml

@@ -56,6 +56,7 @@ toc:
 - title: "Optimize pipeline performance"
   path: /guide/data_performance
 - title: "Analyze pipeline performance"
+  status: new
   path: /guide/data_performance_analysis
 
 - heading: "Save a model"

site/en/tutorials/_toc.yaml

@@ -26,6 +26,7 @@ toc:
     path: /tutorials/keras/save_and_load
   - title: "Tune hyperparameters with the Keras Tuner"
     path: /tutorials/keras/keras_tuner
+    status: new
 
 - title: "Load and preprocess data"
   style: accordion