Switch to newer BandsData entrypoint

Author: Technici4n

src/aiida_dftk/parsers.py

@@ -15,7 +15,7 @@
 import h5py
 
 # DataFactory is used to create the BandsData object
-BandsData = DataFactory('array.bands')
+BandsData = DataFactory('core.array.bands')
 
 class DftkParser(Parser):
     """`Parser` implementation for DFTK."""