Fix buggy typos

data/2025-01-21-stats.json

@@ -50,7 +50,7 @@
     "Thera-SAbDab": 754,
     "EBOLA": 282
   },
-  "antibodiesPerHeavySegments": {
+  "antibodiesPerHeavySegment": {
     "IGHV3": 679792,
     "IGHV4": 296332,
     "IGHV7": 10885,
@@ -67,7 +67,7 @@
     "IGHV11": 68,
     "IGHV15": 14
   },
-  "antibodiesPerLightSegments": {
+  "antibodiesPerLightSegment": {
     "IGLV4": 15025,
     "IGLV9": 1703,
     "IGLV7": 18156,