[DOCS] Fix list format (elastic#195349)

docs/user/ml/index.asciidoc

@@ -22,12 +22,14 @@ image::user/ml/images/ml-data-visualizer-sample.png[{data-viz} for sample flight
 You can upload different file formats for analysis with the *{data-viz}*.
 
 File formats supported up to 500 MB:
+
 * CSV
 * TSV
 * NDJSON
 * Log files
 
 File formats supported up to 60 MB:
+
 * PDF
 * Microsoft Office files (Word, Excel, PowerPoint)
 * Plain Text (TXT)
@@ -258,4 +260,4 @@ menu. If the split field is selected, you can either select specific charts
 (partitions) or set the maximum number of top change points to plot. It's 
 possible to preserve the applied time range or use the time bound from the page 
 date picker. You can also add or edit change point charts directly from the 
-**Dashboard** app.
+**Dashboard** app.