Fixed broken badge.

Signed-off-by: Daniel Scheffler <danschef@gfz-potsdam.de>

README.rst

@@ -12,7 +12,7 @@ A Python package for multi- or hyperspectral image classification.
 Status
 ------
 
-.. image:: https://gitext.gfz-potsdam.de/geomultisens/specclassify/badges/master/build.svg
+.. image:: https://gitext.gfz-potsdam.de/geomultisens/specclassify/badges/master/pipeline.svg
         :target: https://gitext.gfz-potsdam.de/geomultisens/specclassify/commits/master
 .. image:: https://gitext.gfz-potsdam.de/geomultisens/specclassify/badges/master/coverage.svg
         :target: http://geomultisens.gitext.gfz-potsdam.de/specclassify/coverage/