device-amazon-biscuit: switch to minimal initramfs (MR 5294)

[ci:skip-build]: already built successfully in CI

device/testing/device-amazon-biscuit/APKBUILD

@@ -2,7 +2,7 @@
 pkgname=device-amazon-biscuit
 pkgdesc="Amazon Echo Dot (2nd gen)"
 pkgver=1
-pkgrel=1
+pkgrel=2
 url="https://postmarketos.org"
 license="MIT"
 arch="armv7"
@@ -12,6 +12,7 @@ depends="
 	mtk-mkimage
 	mkbootimg
 	postmarketos-base
+	postmarketos-initramfs-minimal
 "
 makedepends="devicepkg-dev"
 source="