Fix release: strip v prefix from deb version field

dpkg requires version to start with a digit, not 'v'.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: Infinit3i

.github/workflows/release.yml

@@ -42,6 +42,8 @@ jobs:
 
       - name: Prepare release artifacts
         run: |
+          # Strip 'v' prefix for deb version (dpkg requires numeric start)
+          VERSION="${GITHUB_REF_NAME#v}"
           mkdir -p release
 
           # Standalone binary tarball
@@ -62,7 +64,7 @@ jobs:
 
           cat > dpkg/DEBIAN/control <<CTRL
           Package: afw
-          Version: ${{ github.ref_name }}
+          Version: $VERSION
           Section: net
           Priority: optional
           Architecture: amd64