Update Windows CI to use php-sdk-2.3.0

php-sdk-2.2.0 still fetches dependencies from the no longer up to date
<https://windows.php.net/downloads/php-sdk/deps/>, and as such won't be
tested with any security updates we provide for Windows.  Given that
PHP 8.1 is going to receive security updates for further 15 months, we
should should not ignore these dependency updates.

Closes GH-16097.

Author: cmb69

.github/workflows/push.yml

@@ -135,7 +135,7 @@ jobs:
       PHP_BUILD_CACHE_BASE_DIR: C:\build-cache
       PHP_BUILD_OBJ_DIR: C:\obj
       PHP_BUILD_CACHE_SDK_DIR: C:\build-cache\sdk
-      PHP_BUILD_SDK_BRANCH: php-sdk-2.2.0
+      PHP_BUILD_SDK_BRANCH: php-sdk-2.3.0
       PHP_BUILD_CRT: vs16
       PLATFORM: x64
       THREAD_SAFE: "1"