Bump to v0.4.8

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: shinaoka

Project.toml

@@ -1,7 +1,7 @@
 name = "Quantics"
 uuid = "87f76fb3-a40a-40c9-a63c-29fcfe7b7547"
 authors = ["Hiroshi Shinaoka <h.shinaoka@gmail.com> and contributors"]
-version = "0.4.7"
+version = "0.4.8"
 
 [deps]
 EllipsisNotation = "da5c29d0-fa7d-589e-88eb-ea29b0a81949"