translation update: pl (last-minute commit from a train for a qgis training;)

git-svn-id: http://svn.osgeo.org/qgis/trunk@14288 c8812cc2-4d05-0410-92ff-de0c093fc19c

Author: borysiasty

i18n/qgis_pl_PL.ts

@@ -17387,7 +17387,7 @@ Może to być spowodowane problemem w sieci lokalnej lub problemem serwera WMS.<
     <message>
         <location filename="../src/app/legend/qgslegend.cpp" line="129"/>
         <source>group</source>
-        <translation>grupuj</translation>
+        <translation>grupa</translation>
     </message>
     <message>
         <location filename="../src/app/legend/qgslegend.cpp" line="458"/>