feat(build): use WinCNG as crypto backend for libssh2 windows

config/pkg/lib/libssh2.yml

@@ -9,7 +9,7 @@ libssh2:
     metadata:
       license-files: [COPYING]
       license: BSD-3-Clause
-  depends:
+  depends@unix:
     - openssl
   headers:
     - libssh2.h

src/Package/Library/libssh2.php

@@ -18,6 +18,7 @@ class libssh2
     {
         WindowsCMakeExecutor::create($lib)
             ->addConfigureArgs(
+                '-DCRYPTO_BACKEND=WinCNG',
                 '-DENABLE_ZLIB_COMPRESSION=ON',
                 '-DBUILD_TESTING=OFF'
             )