testing/prometheus-wireguard-exporter: run cargo with --locked

testing/prometheus-wireguard-exporter/APKBUILD

 # Maintainer:
 pkgname=prometheus-wireguard-exporter
 pkgver=3.2.1
-pkgrel=2
+pkgrel=3
 pkgdesc="A Prometheus exporter for WireGuard, written in Rust"
 url="https://github.com/MindFlavor/prometheus_wireguard_exporter"
 arch="all !s390x !ppc64le !mips !mips64 !riscv64" #Crypto is broken (https://github.com/briansmith/ring/issues/389)
@@ -16,15 +16,15 @@ options="net"
 builddir="$srcdir"/prometheus_wireguard_exporter-"$pkgver"
 
 build() {
-	cargo build --release
+	cargo build --release --locked
 }
 
 check() {
-	cargo test --release
+	cargo test --release --locked
 }
 
 package() {
-	cargo install --path . --root="$pkgdir"/usr
+	cargo install --locked --path . --root="$pkgdir"/usr
 	rm -f "$pkgdir"/usr/.crates2.json
 	rm -f "$pkgdir"/usr/.crates.toml