docs: update example

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Author: kgryte

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

@@ -926,6 +926,41 @@ var table = new UnicodeTable( data, {
 var str = table.render();
 console.log( str );
 // => '...'
+
+// Push new data to the table:
+table.push( [ 1.0, 2.0, 3.0, 4.0, 5.0 ] );
+
+// Re-render the table:
+str = table.render();
+console.log( str );
+// => '...'
+
+// Limit the number of table rows:
+table.bufferSize = 10;
+
+// Re-render the table:
+str = table.render();
+console.log( str );
+// => '...'
+
+// Push new data to the table:
+table.push( [ 6.0, 7.0, 8.0, 9.0, 10.0 ] );
+
+// Re-render the table:
+str = table.render();
+console.log( str );
+// => '...'
+
+// Increase the number of allowed table rows:
+table.bufferSize = 15;
+
+// Push new data to the table:
+table.push( [ 11.0, 12.0, 13.0, 14.0, 15.0 ] );
+
+// Re-render the table:
+str = table.render();
+console.log( str );
+// => '...'
 ```
 
 </section>