Update SAMD51 EEPROM repo link (#16832)

Marlin/src/HAL/HAL_SAMD51/inc/SanityCheck.h

@@ -44,7 +44,7 @@
 #endif
 
 #if ENABLED(EEPROM_SETTINGS) && NONE(SPI_EEPROM, I2C_EEPROM)
-  #warning "Did you activate the SmartEEPROM? See https://github.com/GMagician/SAMD51-SmartEEprom-Activator"
+  #warning "Did you activate the SmartEEPROM? See https://github.com/GMagician/SAMD51-SmartEEprom-Manager/releases"
 #endif
 
 #if HAS_TMC_SW_SERIAL