Fixed typos (#714)

Author: Rahul721999

pgml-dashboard/static/docs/guides/setup/quick_start_with_docker.md

@@ -92,7 +92,7 @@ INFO:  num_features: 64, num_samples: 1797, feature_names: ["sepal length (cm)",
 
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-#### Trainig a model
+#### Training a model
 
 Now that we have a dataset, we can train a model on it. Let's train a simple XGBoost model: