Shorter German translations in ocitysmap.po

To address bug #36166, the translation for Public Building(s) is
replaced with the more literal 'Gebäude(n)', which is slightly
shorter.  Similarly for Education, which was translated as
'Educational institutions', it is replaced this with a more literal
(and shorter) Education -> Bildung.

Of course it doesn't fix the bug, as such, but may help create a
better index on German maps until the bug is fixed properly.

Signed-off-by: Jeroen van Rijn <jvrnix@gmail.com>

locale/de/LC_MESSAGES/ocitysmap.po

@@ -34,7 +34,7 @@ msgstr "Kindergarten"
 #: ocitysmap2/indexlib/indexer.py:168
 #: ocitysmap2/indexlib/indexer.py:169
 msgid "Education"
-msgstr "Bildungseinrichtungen"
+msgstr "Bildung"
 
 #: ocitysmap2/indexlib/indexer.py:166
 msgid "School"
@@ -61,7 +61,7 @@ msgstr "Rathaus"
 #: ocitysmap2/indexlib/indexer.py:172
 #: ocitysmap2/indexlib/indexer.py:174
 msgid "Public buildings"
-msgstr "Öffentliche Einrichtungen"
+msgstr "Öffentlichen Gebäuden"
 
 #: ocitysmap2/indexlib/indexer.py:171
 msgid "Post office"
@@ -69,7 +69,7 @@ msgstr "Postamt"
 
 #: ocitysmap2/indexlib/indexer.py:173
 msgid "Public building"
-msgstr "Öffentliche Einrichtung"
+msgstr "Öffentliches Gebäude"
 
 #: ocitysmap2/indexlib/indexer.py:174
 msgid "Police"