Add user's build (_date_ _time_) to M115 output (#17957)

Co-authored-by: Scott Lahteine <thinkyhead@users.noreply.github.com>

Marlin/src/core/language.h

@@ -125,7 +125,7 @@
 #define STR_INVALID_E_STEPPER               "Invalid E stepper"
 #define STR_E_STEPPER_NOT_SPECIFIED         "E stepper not specified"
 #define STR_INVALID_SOLENOID                "Invalid solenoid"
-#define STR_M115_REPORT                     "FIRMWARE_NAME:Marlin " DETAILED_BUILD_VERSION " SOURCE_CODE_URL:" SOURCE_CODE_URL " PROTOCOL_VERSION:" PROTOCOL_VERSION " MACHINE_TYPE:" MACHINE_NAME " EXTRUDER_COUNT:" STRINGIFY(EXTRUDERS) " UUID:" MACHINE_UUID
+#define STR_M115_REPORT                     "FIRMWARE_NAME:Marlin " DETAILED_BUILD_VERSION " (" __DATE__ " " __TIME__ ") SOURCE_CODE_URL:" SOURCE_CODE_URL " PROTOCOL_VERSION:" PROTOCOL_VERSION " MACHINE_TYPE:" MACHINE_NAME " EXTRUDER_COUNT:" STRINGIFY(EXTRUDERS) " UUID:" MACHINE_UUID
 #define STR_COUNT_X                         " Count X:"
 #define STR_COUNT_A                         " Count A:"
 #define STR_WATCHDOG_FIRED                  "Watchdog timeout. Reset required."