chore(release): update package version to 0.0.4 and fix build paths

* Adjust pkgver in PKGBUILD to 0.0.4
* Update build paths in PKGBUILD for consistency
* Enhance AUR package versioning logic in release workflow

pkg/arch/PKGBUILD

@@ -1,6 +1,6 @@
 # Maintainer: Hein (Warky Devs) <hein@warky.dev>
 pkgname=unitdore
-pkgver=0.1.0
+pkgver=0.0.4
 pkgrel=1
 pkgdesc="A door you open and close for container units — manage containers via systemd"
 arch=('x86_64' 'aarch64')
@@ -12,12 +12,11 @@ optdepends=(
     'docker: Docker container runtime support'
 )
 makedepends=('go')
-backup=('etc/unitdore/units.yaml')
 source=("$pkgname-$pkgver.zip::$url/archive/v$pkgver.zip")
 sha256sums=('SKIP')
 
 build() {
-    cd "$pkgname-v$pkgver"
+    cd "$pkgname"
     export CGO_ENABLED=0
     go build \
         -trimpath \
@@ -26,12 +25,12 @@ build() {
 }
 
 check() {
-    cd "$pkgname-v$pkgver"
+    cd "$pkgname"
     go test ./...
 }
 
 package() {
-    cd "$pkgname-v$pkgver"
+    cd "$pkgname"
 
     # Binary
     install -Dm755 "$pkgname" "$pkgdir/usr/bin/$pkgname"