docs: add sort method documentation

Author: ahmad-kashkoush

lib/node_modules/@stdlib/array/fixed-endian-factory/README.md

@@ -483,6 +483,39 @@ var v = arr.get( 100 );
 // returns undefined
 ```
 
+<a name="method-sort"></a>
+
+#### TypedArrayFE.prototype.sort( compareFcn )
+
+Sorts an array in-place.
+
+```javascript
+function compareFcn( a, b ) {
+    if ( a > b ) {
+        return 1;
+    }
+    if ( a < b ) {
+        return -1;
+    }
+    return 0;
+}
+var Float64ArrayFE = fixedEndianFactory( 'float64' );
+var arr = new Float64ArrayFE( 'little-endian', [ 3.0, 1.0, 2.0 ] );
+// returns <Float64ArrayFE>
+
+var out=arr.sort( compareFcn );
+// returns <Float64ArrayFE>
+
+var v=out.get(0);
+// returns 1.0
+
+v=out.get(1);
+// returns 2.0
+
+v=out.get(2);
+// returns 3.0
+```
+
 <a name="method-index-of"></a>
 
 #### TypedArrayFE.prototype.indexOf( searchElement\[, fromIndex] )