Better choice of code

Followup to #19344

Marlin/src/gcode/calibrate/G76_M871-M872.cpp → Marlin/src/gcode/calibrate/G76_M192_M871.cpp

 }
 
 /**
- * M872: Wait for probe temperature sensor to reach a target
+ * M192: Wait for probe temperature sensor to reach a target
  *
  * Select only one of these flags:
  *    R - Wait for heating or cooling
  *    S - Wait only for heating
  */
-void GcodeSuite::M872() {
+void GcodeSuite::M192() {
   if (DEBUGGING(DRYRUN)) return;
 
   const bool no_wait_for_cooling = parser.seenval('S');

Marlin/src/gcode/gcode.cpp

       #endif
 
       #if ENABLED(PROBE_TEMP_COMPENSATION)
+        case 192: M192(); break;                                  // M192: Wait for probe temp
         case 871: M871(); break;                                  // M871: Print/reset/clear first layer temperature offset values
-        case 872: M872(); break;                                  // M872: Wait for probe temp
       #endif
 
       #if ENABLED(LIN_ADVANCE)

Marlin/src/gcode/gcode.h

  * M868 - Report or set position encoder module error correction threshold.
  * M869 - Report position encoder module error.
  * M871 - Print/reset/clear first layer temperature offset values. (Requires PROBE_TEMP_COMPENSATION)
- * M872 - Wait for probe temp (Requires PROBE_TEMP_COMPENSATION)
+ * M192 - Wait for probe temp (Requires PROBE_TEMP_COMPENSATION)
  * M876 - Handle Prompt Response. (Requires HOST_PROMPT_SUPPORT and not EMERGENCY_PARSER)
  * M900 - Get or Set Linear Advance K-factor. (Requires LIN_ADVANCE)
  * M906 - Set or get motor current in milliamps using axis codes X, Y, Z, E. Report values if no axis codes given. (Requires at least one _DRIVER_TYPE defined as TMC2130/2160/5130/5160/2208/2209/2660 or L6470)
   #endif
 
   #if ENABLED(PROBE_TEMP_COMPENSATION)
+    static void M192();
     static void M871();
-    static void M872();
   #endif
 
   TERN_(LIN_ADVANCE, static void M900());