Update Polish translation

_locales/pl/messages.json

@@ -1008,7 +1008,7 @@
 		"description": "Title of the button 'Print the page' in the editor"
 	},
 	"editorImportMht": {
-		"message": "Import MHTML file",
+		"message": "Importuj plik MHTML",
 		"description": "Title of the button 'Import MHTML file' in the editor"
 	},
 	"pendingsTitle": {
@@ -1092,7 +1092,7 @@
 		"description": "Title of the column in the table of the URLs"
 	},
 	"optionSaveToRestFormApi": {
-		"message": "prześlij do API formularza REST",
+		"message": "przesyłaj do API formularza REST",
 		"description": "Options page label: 'upload to a REST Form API'"
 	},
 	"optionRestFormApiUrl": {