lateral sampling notice

adding lateral sampling notice

README.md

@@ -15,6 +15,8 @@ The release contains 14 co-registered profilometry regions encompassing 16 lette
 - Native lateral sampling: 0.68793625 µm/pixel in X and Y
 - Vertical sensitivity: 8 nm
 
+> **NOTICE — 3 September 2026:** We identified an inconsistency between the lateral sampling recorded in this dataset’s metadata and the value reported in the manuscript. We are investigating the discrepancy and will apply any necessary corrections.
+
 ## Data
 
 Each sample under `data/` has four files with identical dimensions and a top-left origin: