chore: fix typo in readme (#1739)

Author: sararob

README.rst

@@ -315,7 +315,7 @@ To list all model evaluations for a model:
 
 .. code-block:: Python
 
-  model = aiplatform.Model('/projects/my-project/locations/us-central1/models/{MODEL_ID}')
+  model = aiplatform.Model('projects/my-project/locations/us-central1/models/{MODEL_ID}')
 
   evaluations = model.list_model_evaluations()
   
@@ -324,7 +324,7 @@ To get the model evaluation resource for a given model:
 
 .. code-block:: Python
 
-  model = aiplatform.Model('/projects/my-project/locations/us-central1/models/{MODEL_ID}')
+  model = aiplatform.Model('projects/my-project/locations/us-central1/models/{MODEL_ID}')
 
   # returns the first evaluation with no arguments, you can also pass the evaluation ID
   evaluation = model.get_model_evaluation()
@@ -337,7 +337,7 @@ You can also create a reference to your model evaluation directly by passing in
 .. code-block:: Python
 
   evaluation = aiplatform.ModelEvaluation(
-    evaluation_name='/projects/my-project/locations/us-central1/models/{MODEL_ID}/evaluations/{EVALUATION_ID}')
+    evaluation_name='projects/my-project/locations/us-central1/models/{MODEL_ID}/evaluations/{EVALUATION_ID}')
 
 Alternatively, you can create a reference to your evaluation by passing in the model and evaluation IDs: