Fix sha256sums replacement for multi-line PKGBUILD arrays

The original PKGBUILD has sha256sums split across multiple lines.
Use sed range replacement to handle this correctly.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: sinelaw

.github/workflows/aur-publish.yml

@@ -49,7 +49,8 @@ jobs:
           cd aur-repo
           sed -i "s/^pkgver=.*/pkgver=${{ steps.version.outputs.version }}/" PKGBUILD
           sed -i "s/^pkgrel=.*/pkgrel=1/" PKGBUILD
-          sed -i 's/^sha256sums=.*/sha256sums=("${{ steps.checksum.outputs.sha256 }}" "SKIP")/' PKGBUILD
+          # Replace multi-line sha256sums array (handles both single and multi-line formats)
+          sed -i '/^sha256sums=(/,/)$/c\sha256sums=("${{ steps.checksum.outputs.sha256 }}" "SKIP")' PKGBUILD
           echo "Updated PKGBUILD:"
           cat PKGBUILD