build: Update Java from 21 to 25 (#97)

Author: thorlauridsen

README.md

@@ -208,7 +208,7 @@ Once the entire system is running, you can view the Swagger documentation at:
 
 ## Technology
 
-- [JDK21](https://openjdk.org/projects/jdk/21/) - Latest JDK with long-term support
+- [JDK25](https://openjdk.org/projects/jdk/25/) - Latest JDK with long-term support
 - [Gradle](https://github.com/gradle/gradle) - Used for compilation, building, testing and dependency management
 - [Spring Cloud AWS](https://github.com/awspring/spring-cloud-aws) - For interacting with Amazon Web Services SQS and SNS
 - [LocalStack](https://github.com/localstack/localstack) - For testing Amazon Web Services SQS and SNS locally

build.gradle.kts

@@ -7,7 +7,7 @@ version = "0.0.1-SNAPSHOT"
 
 java {
 	toolchain {
-		languageVersion = JavaLanguageVersion.of(21)
+		languageVersion = JavaLanguageVersion.of(25)
 	}
 }