[gnome-documents] Update Polish translation

[Piotr Drąg <piotrdrag src gnome org>]

commit bb5fc0f0021016162cf17db4ec3d986d392ba9af
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Mon Aug 21 02:18:42 2017 +0200

    Update Polish translation

 po/pl.po |    9 +++++++--
 1 files changed, 7 insertions(+), 2 deletions(-)
---
diff --git a/po/pl.po b/po/pl.po
index e74c5dd..7e4ef5d 100644
--- a/po/pl.po
+++ b/po/pl.po
@@ -9,8 +9,8 @@ msgid ""
 msgstr ""
 "Project-Id-Version: gnome-documents\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2017-08-11 03:18+0200\n"
-"PO-Revision-Date: 2017-08-11 03:22+0200\n"
+"POT-Creation-Date: 2017-08-21 02:17+0200\n"
+"PO-Revision-Date: 2017-08-21 02:18+0200\n"
 "Last-Translator: Piotr Drąg <piotrdrag gmail com>\n"
 "Language-Team: Polish <community-poland mozilla org>\n"
 "Language: pl\n"
@@ -61,6 +61,11 @@ msgstr "Wyświetlanie e-booków (plików PDF i komiksów) w trybie pełnoekran
 msgid "Print e-books"
 msgstr "Drukowanie e-booków"
 
+#: ../data/org.gnome.Books.appdata.xml.in.h:9
+#: ../data/org.gnome.Documents.appdata.xml.in.h:13
+msgid "The GNOME Project"
+msgstr "Projekt GNOME"
+
 #: ../data/org.gnome.Books.desktop.in.h:2
 msgid "Access, manage and share books"
 msgstr "Czytanie, zarządzanie i udostępnianie książek"