fixing typo

Author: v-dirichards

articles/machine-learning/reference-yaml-monitor.md

@@ -172,7 +172,7 @@ The feature attribution of a model may change over time due to changes in the di
 | `production_data` | Array | **Optional**, default to collected data associated with Azure Machine Learning endpoint if this is not provided. The `production_data` is a list of dataset and its associated meta data, it must include both model inputs and model outputs data. It could be a single dataset with both model inputs and outputs, or it could be two separate datasets containing one model inputs and one model outputs.| | |
 | `production_data.input_data` | Object | **Optional**. Description of input data source,  see [job input data](./reference-yaml-job-command.md#job-inputs) specification.| | |
 | `production_data.data_context` | String | The context of data. It refers to production model inputs data. | `model_inputs`, `model_outputs`, `model_inputs_outputs` |  |
-| `production_data.data_column_names` | Object | Correlation column name and prediction colum names in `key:value` format, needed for data joining. | Allowed keys are: `correlation_id`, `prediction`, `prediction_probability`  |
+| `production_data.data_column_names` | Object | Correlation column name and prediction column names in `key:value` format, needed for data joining. | Allowed keys are: `correlation_id`, `prediction`, `prediction_probability`  |
 | `production_data.pre_processing_component` | String | Component ID in the format of `azureml:myPreprocessing@latest` for a registered component. This is required if `production_data.input_data.type` is `uri_folder`, see [preprocessing component specification](./how-to-monitor-model-performance.md#set-up-model-monitoring-by-bringing-your-own-production-data-to-azure-machine-learning). | | |
 | `production_data.data_window_size` | String |**Optional**. Data window size in days with ISO8601 format, for example `P7D`. This is the production data window to be computed for data quality issues. | By default the data window size is the last monitoring period.| |
 | `reference_data` | Object | **Optional**. Recent past production data is used as comparison baseline data if this isn't specified. Recommendation is to use training data as comparison baseline. | | |