fix(language): fix typo

closes monkeytypegame#6952

Author: Miodec

frontend/static/languages/japanese_romaji.json

@@ -113,7 +113,7 @@
     "tori",
     "raishuu",
     "maishuu",
-    "dakera",
+    "dakara",
     "nan",
     "shiro",
     "ashita",