Update README.md

README.md

@@ -17,7 +17,7 @@ These results were generated by RBF Morph Srl and serve as the foundational data
 
 ## File Structure
 *   **Format:** `.vtu` (compatible with ParaView and standard VTK libraries).
-*   **Volume:** ~200 files (~19 GB total).
+*   **Volume:** \~200 files (\~19 GB total).
 *   **Contents:** Each file contains the mesh geometry and the associated nodal/cell data arrays for the simulation results.
 
 ## Usage and License