🐛 Fix Octopus v1.x probe pin (#23548)

Marlin/src/pins/stm32f4/pins_BTT_OCTOPUS_PRO_V1_0.h

   #define TEMP_0_PIN                        PF4   // TH0
 #endif
 
+#if !defined(Z_MIN_PROBE_PIN) && DISABLED(BLTOUCH)
+  #define Z_MIN_PROBE_PIN                   PC5   // Probe (Proximity switch) port
+#endif
+
 #include "pins_BTT_OCTOPUS_V1_common.h"

Marlin/src/pins/stm32f4/pins_BTT_OCTOPUS_V1_common.h

 // Z Probe (when not Z_MIN_PIN)
 //
 #ifndef Z_MIN_PROBE_PIN
-  #if ENABLED(BLTOUCH)
-    #define Z_MIN_PROBE_PIN                 PB7
-  #else
-    #define Z_MIN_PROBE_PIN                 PC5   // Probe (Proximity switch) port
-  #endif
+  #define Z_MIN_PROBE_PIN                   PB7
 #endif
 
 //