add c3_2 categorical option

Left out by accident I think

app.py

@@ -77,7 +77,7 @@ BLINDED_PARAM_BOUNDS = [
     {"name": "x20", "type": "range", "bounds": [0.0, 1.0]},
     {"name": "c1", "type": "choice", "values": ["c1_0", "c1_1"]},
     {"name": "c2", "type": "choice", "values": ["c2_0", "c2_1"]},
-    {"name": "c3", "type": "choice", "values": ["c3_0", "c3_1"]},
+    {"name": "c3", "type": "choice", "values": ["c3_0", "c3_1", "c3_2"]},
     {"name": "fidelity1", "type": "range", "bounds": [0.0, 1.0]},
 ]