Prettify markdown in docs in v8.1.x (#37647)

docs/sources/developers/plugins/add-support-for-explore-queries.md

@@ -29,9 +29,7 @@ The query editor for Explore is similar to the query editor for the data source
    export type Props = ExploreQueryFieldProps<DataSource, MyQuery, MyDataSourceOptions>;
 
    export default (props: Props) => {
-     return (
-       <h2>My query editor</h2>
-     );
+     return <h2>My query editor</h2>;
    };
    ```
 
@@ -92,6 +90,7 @@ Explore should by default select a reasonable visualization for your data so use
 If this does not work for you or you want to show some data in a specific visualization, add a hint to your returned data frame using the `preferredVisualisationType` meta attribute.
 
 You can construct a data frame with specific metadata:
+
 ```
 const firstResult = new MutableDataFrame({
     fields: [...],