add proper serialVersionUID

Author: Benjosh95

core/src/main/java/cloud/stackit/sdk/core/exception/AuthenticationException.java

@@ -5,7 +5,7 @@
  * and validation failures.
  */
 public class AuthenticationException extends RuntimeException {
-	private static final long serialVersionUID = 1L;
+	private static final long serialVersionUID = -7728708330906023941L;
 
 	/**
 	 * Constructs a new AuthenticationException with the specified detail message.

core/src/main/java/cloud/stackit/sdk/core/exception/SdkException.java

@@ -5,7 +5,7 @@
  * SDK-related failures.
  */
 public class SdkException extends RuntimeException {
-	private static final long serialVersionUID = 1L;
+	private static final long serialVersionUID = 4349442434992445252L;
 
 	/**
 	 * Constructs a new SdkException with the specified detail message.