Updated docs with erase flash option

Author: P-R-O-C-H-Y

docs/source/guides/tools_menu.rst

@@ -196,6 +196,14 @@ Events Run On
 
 This function is also used to select the core that runs the Arduino events. This is only valid if the target SoC has 2 cores.
 
+Erase Flash
+***********
+
+This function is used to select if the flash memory should be erased before uploading the sketch.
+
+* **Only Sketch** - Upload the sketch without erasing all flash contents. (default)
+* **All Flash Contents** - Erase all flash contents before uploading the sketch.
+
 Port
 ****