🩹 Fix missing MSG_ATTACH_SD_MEDIA define (MarlinFirmware#27020)

Co-authored-by: ellensp <530024+ellensp@users.noreply.github.com>

Author: thisiskeithb

Marlin/src/lcd/language/language_en.h

@@ -567,6 +567,7 @@ namespace Language_en {
   #else
     LSTR MSG_ATTACH_MEDIA                 = _UxGT("Attach ") MEDIA_TYPE_EN;
   #endif
+  LSTR MSG_ATTACH_SD_MEDIA                = _UxGT("Attach SD Card");
   LSTR MSG_CHANGE_MEDIA                   = _UxGT("Change ") MEDIA_TYPE_EN;
   LSTR MSG_RELEASE_MEDIA                  = _UxGT("Release ") MEDIA_TYPE_EN;
   LSTR MSG_ZPROBE_OUT                     = _UxGT("Z Probe Past Bed");