modify chip 15, 25 chiplabel

ObservationSim/Instrument/data/ccd/chip_definition.json

@@ -468,7 +468,7 @@
         "full_well": 90000
     },
     "15": {
-        "chip_name": "y-4",
+        "chip_name": "y-2",
         "pix_size": 0.01,
         "pix_scale": 0.074,
         "npix_x": 9216,
@@ -648,7 +648,7 @@
         "full_well": 90000
     },
     "25": {
-        "chip_name": "y-2",
+        "chip_name": "y-4",
         "pix_size": 0.01,
         "pix_scale": 0.074,
         "npix_x": 9216,