nighly benchy: add annot for cohere regeneration for float conversion bug

Author: mikemccand

src/python/notation.py

@@ -499,6 +499,11 @@
     "#11888: optimize terms dictionary lookups when all terms have the same suffix length, which helps primary key lookup for fixed-length fields",
   ),
   ("2024-04-29", "#264: use Lucene defaults for ConcurrentMergeSchedular", "#264: use Lucene defaults for ConcurrentMergeSchedular"),
+  (
+    "2024-04-30",
+    "#256: regenerate 768 dimension Cohere vectors to fix float64 -> float32 conversion bug https://github.com/mikemccand/luceneutil/issues/256",
+    "#256: regenerate 768 dimension Cohere vectors to fix float64 -> float32 conversion bug https://github.com/mikemccand/luceneutil/issues/256",
+  ),
   (
     "2024-05-20",
     "Disjunction as CompetitiveIterator for numeric dynamic pruning https://github.com/apache/lucene/pull/13221",