Typo

config.json

 {
-    "pypsa_model_filename": "C:/code/pypsa-eur/networks/elec_s_5_ec_lcopt_Co2L-24H.nc",
-    "index_filname": "F:/Python/index_file.xlsx",
+    "pypsa_model_filename": "F:/PyPSA_Ueberordner/pypsa-eur/networks/elec_s_6_ec_lcopt_Co2L-24H.nc",
+    "index_filename": "F:/PyPSA_to_backbone/index_file.xlsx",
     "backbone_filename" : "F:/Modelle/Deutschland/data/Deutschland.xlsx"
 }
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