Update README for castle-rock; improve nebraska workaround

layers/dot-cams/castle-rock/get_data.py

@@ -65,7 +65,11 @@ for state, baseURL in states.items():
                 print(f"warn: Differing types detected: {c['views']}")
             if view['category'] == 'VIDEO':
                 if state == "Nebraska":
-                    print(c)
+                    # Nebraska has mislabeled a small amount of their data;
+                    # there is one location with 4 views labeled as "VIDEO"
+                    # which are not, in fact, video-containing views
+                    view['category'] = "PHOTO"
+                    continue
                 videoCount += 1
                 if len(view['sources']) != 1:
                     raise Exception(f"Unexpected number of sources ({len(view['sources'])})")