Refine README title hierarchy.

Make the paper title the primary heading so the project page reads more cleanly and aligns with the publication-first presentation.

Co-authored-by: Cursor <cursoragent@cursor.com>

README.md

@@ -1,6 +1,5 @@
-# AlignMark
+# Feature-Aligned Speech Watermarking for Robustness to Reconstruction Distortions
 
-**Feature-Aligned Speech Watermarking for Robustness to Reconstruction Distortions**  
 Official implementation of the ICME 2026 paper.
 
 **Authors**