[gnome-sudoku] Update Polish translation

[Piotr Drąg <piotrdrag src gnome org>]

commit 664b2a7b78ddb0b51f71440fc095a15537a446d4
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Tue Aug 7 19:06:19 2018 +0200

    Update Polish translation

 help/pl/pl.po | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/help/pl/pl.po b/help/pl/pl.po
index e7150ea..59b403c 100644
--- a/help/pl/pl.po
+++ b/help/pl/pl.po
@@ -7,8 +7,8 @@
 msgid ""
 msgstr ""
 "Project-Id-Version: gnome-sudoku-help\n"
-"POT-Creation-Date: 2017-12-07 08:43+0000\n"
-"PO-Revision-Date: 2018-02-08 00:45+0100\n"
+"POT-Creation-Date: 2018-08-07 13:45+0000\n"
+"PO-Revision-Date: 2018-08-07 19:05+0200\n"
 "Last-Translator: Piotr Drąg <piotrdrag gmail com>\n"
 "Language-Team: Polish <community-poland mozilla org>\n"
 "Language: pl\n"
@@ -659,7 +659,7 @@ msgstr "Wybierz liczbę sudoku do wydrukowania z rozwijanego menu."
 
 #. (itstool) path: item/p
 #: C/print-blank-puzzles.page:32
-msgid "Select difficult level of the games you would like to print."
+msgid "Select the difficulty level of the games you would like to print."
 msgstr "Wybierz poziom trudności drukowanych sudoku."
 
 #. (itstool) path: item/p