Update README.md

README.md

 # Pitch Estimator
 
+positional arguments:
+  file                  Folder of .preds (dictionnaries 'filename': model's
+                        prediction array)
+
+optional arguments:
+  -h, --help            show this help message and exit
+  --output OUTPUT       Output folder, (default: ./)
+  --extend EXTEND       Number of preds to extend the calls on the right side
+                        (default: 0)
+  --pred_threshold PRED_THRESHOLD
+                        Threshold for considering an prediction true (between
+                        0 and 1) (default: 0.9)
+  --display DISPLAY     Boolean for displaying calls and their pitch (default:
+                        False)
+  --saveimg SAVEIMG     Path for saving vocalisation images (default: None)
+  --specific_time SPECIFIC_TIME
+                        Date for running at specific time using pandas date
+                        indexing, format : YYYY-MM-DD HH:MM:SS (default: None)