🌐 Update Greek language (#22799)

Marlin/src/lcd/language/language_el.h

@@ -34,7 +34,7 @@ namespace Language_el {
   using namespace Language_en; // Inherit undefined strings from English
 
   constexpr uint8_t CHARSIZE              = 2;
-  LSTR LANGUAGE                           = _UxGT("Greek");
+  LSTR LANGUAGE                           = _UxGT("Greek (Greece)");
 
   LSTR WELCOME_MSG                        = MACHINE_NAME _UxGT(" έτοιμος.");
   LSTR MSG_YES                            = _UxGT("ΝΑΙ");

Marlin/src/lcd/language/language_el_CY.h

@@ -0,0 +1,38 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ */
+#pragma once
+
+/**
+ * Greek (Cyprus)
+ *
+ * LCD Menu Messages
+ * See also https://marlinfw.org/docs/development/lcd_language.html
+ */
+
+#include "language_el.h"
+
+namespace Language_el_CY {
+  using namespace Language_el; // Inherit undefined strings from Greek (or English)
+
+  constexpr uint8_t CHARSIZE              = 2;
+  LSTR LANGUAGE                           = _UxGT("Greek (Cyprus)");
+}