[gimp] Update Polish translation

[Piotr Drąg <piotrdrag src gnome org>]

commit 6f2c92a8cc230dfdb8b49de6eb0f1007d55f5f26
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Sun May 13 22:09:05 2018 +0200

    Update Polish translation

 po/pl.po |    8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)
---
diff --git a/po/pl.po b/po/pl.po
index d25f5f7..d7a5b0c 100644
--- a/po/pl.po
+++ b/po/pl.po
@@ -23,8 +23,8 @@ msgid ""
 msgstr ""
 "Project-Id-Version: gimp\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2018-05-13 21:22+0200\n"
-"PO-Revision-Date: 2018-05-13 21:23+0200\n"
+"POT-Creation-Date: 2018-05-13 22:07+0200\n"
+"PO-Revision-Date: 2018-05-13 22:08+0200\n"
 "Last-Translator: Piotr Drąg <piotrdrag gmail com>\n"
 "Language-Team: Polish <community-poland mozilla org>\n"
 "Language: pl\n"
@@ -21259,8 +21259,8 @@ msgid "Roughly outline the object to extract"
 msgstr "Nierówno obrysowuje obiekt do wydobycia"
 
 #: ../app/tools/gimpforegroundselecttool.c:616
-msgid "press Enter to validate."
-msgstr "naciśnięcie klawisza Enter sprawdzi poprawność."
+msgid "press Enter to refine."
+msgstr "naciśnięcie klawisza Enter umożliwi poprawienie."
 
 #: ../app/tools/gimpforegroundselecttool.c:643
 msgid "Selecting foreground"