Contributors.md

@@ -5,12 +5,12 @@
 - Gerrit Erichsen (Lead Developer)
 - Tobias Zimmermann (Core Developer)
 
-### Inactive
+### Finished
 - Tobias Becke (Development Solar Power Calculation)
 
 ## Contributors
 ### Active
 - Béla Wiegel (Map representation/GUI)
 
-### Inactive
+### Finished
 - Tobias Cors (Master thesis, Improvement of MILP model)
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