Patch PrintJobRecovery::filename

Marlin/src/feature/power_loss_recovery.cpp

 
 SdFile PrintJobRecovery::file;
 job_recovery_info_t PrintJobRecovery::info;
+const char PrintJobRecovery::filename[5] = "/PLR";
 
 #include "../sd/cardreader.h"
 #include "../lcd/ultralcd.h"

Marlin/src/feature/power_loss_recovery.h

 
 class PrintJobRecovery {
   public:
-    static constexpr char filename[5] = "/PLR";
+    static const char filename[5];
 
     static SdFile file;
     static job_recovery_info_t info;