Update Kani Metrics (model-checking#257)

This is an automated PR to update Kani metrics.

The metrics have been updated by running `./scripts/run-kani.sh --run
metrics`.

Co-authored-by: github-merge-queue <[email protected]>

Author: github-actions[bot]

scripts/kani-std-analysis/metrics-data.json

@@ -64,6 +64,19 @@
       "safe_fns_under_contract": 77,
       "verified_safe_fns_under_contract": 77,
       "total_functions_under_contract": 273
+    },
+    {
+      "date": "2025-02-23",
+      "total_unsafe_fns": 6987,
+      "total_safe_abstractions": 1704,
+      "total_safe_fns": 14666,
+      "unsafe_fns_under_contract": 192,
+      "verified_unsafe_fns_under_contract": 132,
+      "safe_abstractions_under_contract": 41,
+      "verified_safe_abstractions_under_contract": 41,
+      "safe_fns_under_contract": 77,
+      "verified_safe_fns_under_contract": 77,
+      "total_functions_under_contract": 273
     }
   ]
 }