Revert hardcoded 9.6 schema

Author: smnandre

src/LiveComponent/phpunit.xml.dist

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!-- https://phpunit.de/manual/current/en/appendixes.configuration.html -->
 <phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.6/phpunit.xsd"
+         xsi:noNamespaceSchemaLocation="vendor/bin/.phpunit/phpunit.xsd"
          colors="true"
          bootstrap="vendor/autoload.php"
          failOnRisky="true"

src/TwigComponent/phpunit.xml.dist

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!-- https://phpunit.de/manual/current/en/appendixes.configuration.html -->
 <phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:noNamespaceSchemaLocation="https://schema.phpunit.de/9.6/phpunit.xsd"
+         xsi:noNamespaceSchemaLocation="vendor/bin/.phpunit/phpunit.xsd"
          colors="true"
          bootstrap="vendor/autoload.php"
          failOnRisky="true"