fix(i18n): typo in polish translation (#204)

Author: kicaj

src/app/src/locales/pl.json

@@ -220,7 +220,7 @@
         "paragraph": "Akapit",
         "insert": "Wstaw",
         "image": "Obraz",
-        "video": "Video",
+        "video": "Wideo",
         "horizontalRule": "Linia pozioma"
       },
       "drag": {