Add missing space in ProgressCode message

Such that:
MMU2:P=123EngageIdler
Becomes:
MMU2:P=123 EngageIdler

Firmware/mmu2.cpp

@@ -633,10 +633,10 @@ void MMU2::ReportError(ErrorCode ec) {
 
 void MMU2::ReportProgress(ProgressCode pc) {
     ReportProgressHook((CommandInProgress)logic.CommandInProgress(), (uint16_t)pc);
-    
+
     // Log progress - example: MMU2:P=123 EngageIdler
     char msg[64];
-    int len = snprintf(msg, sizeof(msg), "MMU2:P=%hu", (uint16_t)pc);
+    int len = snprintf(msg, sizeof(msg), "MMU2:P=%hu ", (uint16_t)pc);
     // Append a human readable form of the progress code
     TranslateProgress((uint16_t)pc, &msg[len], 64 - len);