testing/xmrig-proxy: upgrade to 6.12.0

Ref https://github.com/xmrig/xmrig-proxy/releases/tag/v6.12.0

testing/xmrig-proxy/APKBUILD

@@ -2,7 +2,7 @@
 # Maintainer: Oleg Titov <oleg.titov@gmail.com>
 
 pkgname=xmrig-proxy
-pkgver=6.11.0
+pkgver=6.12.0
 pkgrel=0
 pkgdesc="XMRig Proxy is a high performance Monero (XMR) Stratum protocol proxy"
 url="https://xmrig.com/xmrig-proxy"
@@ -24,4 +24,4 @@ package() {
 	install -Dm 644 -t "$pkgdir"/usr/share/doc/$pkgname/ README.md
 }
 
-sha512sums="67a25e7a28094ac55390fdbcae9da941c1d6bbd1531660c69d0f589df4296a3f76cbaae3cfc8ea95dbf973d4821526de02bbb0523d3c01ed545f4d1d9fc64cab  xmrig-proxy-6.11.0.tar.gz"
+sha512sums="dbbe09632e04970453104e5906c0a74f9330e62039175bbf545c46b8bb8d23632605f31afd59b2e71b216caef68259c6e0d53bdacd90369b644dd88564e125e1  xmrig-proxy-6.12.0.tar.gz"