Follow up the PR #5167 (Add Turkish Language) again, etc

・Update forgotten K8400\Dual-head\Configuration.h
・Adjust spacing

Marlin/example_configurations/K8400/Dual-head/Configuration.h

@@ -1009,9 +1009,9 @@
 // Here you may choose the language used by Marlin on the LCD menus, the following
 // list of languages are available:
 //    en, an, bg, ca, cn, cz, de, el, el-gr, es, eu, fi, fr, gl, hr, it,
-//    kana, kana_utf8, nl, pl, pt, pt_utf8, pt-br, pt-br_utf8, ru, test
+//    kana, kana_utf8, nl, pl, pt, pt_utf8, pt-br, pt-br_utf8, ru, tr, test
 //
-// :{'en':'English','an':'Aragonese','bg':'Bulgarian','ca':'Catalan','cn':'Chinese','cz':'Czech','de':'German','el':'Greek','el-gr':'Greek (Greece)','es':'Spanish','eu':'Basque-Euskera','fi':'Finnish','fr':'French','gl':'Galician','hr':'Croatian','it':'Italian','kana':'Japanese','kana_utf8':'Japanese (UTF8)','nl':'Dutch','pl':'Polish','pt':'Portuguese','pt-br':'Portuguese (Brazilian)','pt-br_utf8':'Portuguese (Brazilian UTF8)','pt_utf8':'Portuguese (UTF8)','ru':'Russian','test':'TEST'}
+// :{ 'en':'English', 'an':'Aragonese', 'bg':'Bulgarian', 'ca':'Catalan', 'cn':'Chinese', 'cz':'Czech', 'de':'German', 'el':'Greek', 'el-gr':'Greek (Greece)', 'es':'Spanish', 'eu':'Basque-Euskera', 'fi':'Finnish', 'fr':'French', 'gl':'Galician', 'hr':'Croatian', 'it':'Italian', 'kana':'Japanese', 'kana_utf8':'Japanese (UTF8)', 'nl':'Dutch', 'pl':'Polish', 'pt':'Portuguese', 'pt-br':'Portuguese (Brazilian)', 'pt-br_utf8':'Portuguese (Brazilian UTF8)', 'pt_utf8':'Portuguese (UTF8)', 'ru':'Russian', 'tr':'Turkish', 'test':'TEST' }
 //
 #define LCD_LANGUAGE en