fix: use --tag flag in git-cliff to assign commits to version section

This ensures new commits get assigned to the proper version section
in CHANGELOG.md (e.g., ## [0.8.1]) instead of appearing under
Unreleased. The --tag flag tells git-cliff to treat the upcoming
version as if it already exists.

Author: jrollin

scripts/release.sh

@@ -71,7 +71,7 @@ cargo check --quiet
 
 # Generate CHANGELOG.md
 echo "→ Generating CHANGELOG.md"
-git cliff -o CHANGELOG.md
+git cliff --tag "v$VERSION" -o CHANGELOG.md
 
 # Show what changed
 echo ""