filters update

lib/oscillators/cfo/Cfo.cs

@@ -4,7 +4,7 @@ using System.Runtime.InteropServices;
 namespace QuanTAlib;
 
 /// <summary>
-/// CFO: Chande Forecast Oscillator
+/// CFO: Chande Forecast Oscillator (also known as FOSC)
 /// </summary>
 /// <remarks>
 /// Measures the percentage difference between the current price and the

lib/oscillators/cfo/Cfo.md

@@ -1,4 +1,4 @@
-# CFO: Chande Forecast Oscillator
+# CFO: Chande Forecast Oscillator (also known as FOSC)
 
 > "The distance between where you are and where regression says you should be tells you everything about momentum." -- Tushar Chande, paraphrased