[#2030] Upgrade SQL Server JDBC driver to 12.8.1

Author: DavideD

hibernate-reactive-core/build.gradle

@@ -49,7 +49,7 @@ dependencies {
     testRuntimeOnly "org.postgresql:postgresql:42.7.3"
 
     // JDBC driver for Testcontainers with MS SQL Server
-    testRuntimeOnly "com.microsoft.sqlserver:mssql-jdbc:12.2.0.jre11"
+    testRuntimeOnly "com.microsoft.sqlserver:mssql-jdbc:12.8.1.jre11"
 
     // JDBC driver for Testcontainers with MariaDB Server
     testRuntimeOnly "org.mariadb.jdbc:mariadb-java-client:3.1.4"