Merge pull request #639 from gooddata/jaceksan-patch-1

trivial: Fix example in get_visualization.md

Author: Mara3l

docs/content/en/docs/workspace-content/workspace-content/get_visualization.md

@@ -31,5 +31,5 @@ A single Visualization object contains side loaded metadata about the entities i
 
 ```python
 # Get all visualizations
-visualizations = sdk.visualizations.get_visualizations(workspace_id="123")
+visualizations = sdk.visualizations.get_visualizations(workspace_id="123", visualization_id="abc")
 ```