📝 Update Toolchange FS comments

Marlin/Configuration_adv.h

@@ -2417,7 +2417,7 @@
   #if ENABLED(TOOLCHANGE_FILAMENT_SWAP)
     // Load / Unload
     #define TOOLCHANGE_FS_LENGTH              12  // (mm) Load / Unload length
-    #define TOOLCHANGE_FS_EXTRA_RESUME_LENGTH  0  // (mm) Extra length for better restart, fine tune by LCD/Gcode)
+    #define TOOLCHANGE_FS_EXTRA_RESUME_LENGTH  0  // (mm) Extra length for better restart. Adjust with LCD or M217 B.
     #define TOOLCHANGE_FS_RETRACT_SPEED   (50*60) // (mm/min) (Unloading)
     #define TOOLCHANGE_FS_UNRETRACT_SPEED (25*60) // (mm/min) (On SINGLENOZZLE or Bowden loading must be slowed down)
 
@@ -2431,12 +2431,12 @@
     #define TOOLCHANGE_FS_FAN_SPEED          255  // 0-255
     #define TOOLCHANGE_FS_FAN_TIME            10  // (seconds)
 
-    // Swap uninitialized extruder with TOOLCHANGE_FS_PRIME_SPEED for all lengths (recover + prime)
+    // Swap uninitialized extruder (using TOOLCHANGE_FS_PRIME_SPEED feedrate)
     // (May break filament if not retracted beforehand.)
     //#define TOOLCHANGE_FS_INIT_BEFORE_SWAP
 
-    // Prime on the first T0 (If other, TOOLCHANGE_FS_INIT_BEFORE_SWAP applied)
-    // Enable it (M217 V[0/1]) before printing, to avoid unwanted priming on host connect
+    // Prime on the first T0 (For other tools use TOOLCHANGE_FS_INIT_BEFORE_SWAP)
+    // Enable with M217 V1 before printing to avoid unwanted priming on host connect
     //#define TOOLCHANGE_FS_PRIME_FIRST_USED
 
     /**