docs: update example

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---

Author: kgryte

lib/node_modules/@stdlib/plot/table/unicode/README.md

@@ -985,7 +985,8 @@ var table = new UnicodeTable( data, {
     'maxWidth': 200,
     'marginLeft': 5,
     'marginRight': 5,
-    'align': 'right'
+    'align': 'right',
+    'format': '%0.5f'
 });
 
 // Render the table: