Update README.md (#158)

Fixed a typo

Author: luigiw

scenarios/evaluate/README.md

@@ -50,7 +50,7 @@ The main objective of this tutorial is to help users understand the process of e
 | [Evaluate_Base_Model_Endpoint.ipynb](Supported_Evaluation_Targets/Evaluate_Base_Model_Endpoint/Evaluate_Base_Model_Endpoint.ipynb)              |             |           |                     |      |          | X                      |            | X                    |                |                      |
 | [Evaluate_App_Endpoint.ipynb](Supported_Evaluation_Targets/Evaluate_App_Endpoint/Evaluate_App_Endpoint.ipynb)                    |             |           |                     |       |         |                       | X           | X                    |                |                      |
 | [AI_Judge_Evaluators_Quality.ipynb](Supported_Evaluation_Metrics/AI_Judge_Evaluators_Quality/AI_Judge_Evaluators_Quality.ipynb)            |             |           |                     |       |         | X                      |            | X                    |                |                      |
-| [Custum_Evaluators.ipynb](Supported_Evaluation_Metrics/Custom_Evaluators/Custom_Evaluators.ipynb)                |             |           |                     |       |         | X                      |            |                     | X               |                      |
+| [Custom_Evaluators.ipynb](Supported_Evaluation_Metrics/Custom_Evaluators/Custom_Evaluators.ipynb)                |             |           |                     |       |         | X                      |            |                     | X               |                      |
 | [NLP_Evaluators.ipynb](Supported_Evaluation_Metrics/NLP_Evaluators/NLP_Evaluators.ipynb)            |             |           |                     |       |         | X                      |             |                     |               | X                     |
 | [AI_Judge_Evaluators_Safety_Risks.ipynb](Supported_Evaluation_Metrics/AI_Judge_Evaluators_Safety_Risks/AI_Judge_Evaluators_Safety_Risks.ipynb)            | X           |           |                     |       |          | X                     |             |                     |                |                      |
 | [Simulate_Evaluate_Groundedness.py](Simulators/Simulate_Evaluate_Groundedness/Simulate_Evaluate_Groundedness.ipynb)      |             | X         |                     |      | X        | X                     |             | X                    |                |                    |