Upgrade to ASM 9.8 (for early Java 25 support)

Closes gh-34600

spring-core/src/main/java/org/springframework/asm/ClassReader.java

@@ -195,7 +195,7 @@ public class ClassReader {
     this.b = classFileBuffer;
     // Check the class' major_version. This field is after the magic and minor_version fields, which
     // use 4 and 2 bytes respectively.
-    if (checkClassVersion && readShort(classFileOffset + 6) > Opcodes.V24) {
+    if (checkClassVersion && readShort(classFileOffset + 6) > Opcodes.V25) {
       throw new IllegalArgumentException(
           "Unsupported class file major version " + readShort(classFileOffset + 6));
     }

spring-core/src/main/java/org/springframework/asm/MethodVisitor.java

@@ -594,7 +594,7 @@ public abstract class MethodVisitor {
    * Visits a LOOKUPSWITCH instruction.
    *
    * @param dflt beginning of the default handler block.
-   * @param keys the values of the keys.
+   * @param keys the values of the keys. Keys must be sorted in increasing order.
    * @param labels beginnings of the handler blocks. {@code labels[i]} is the beginning of the
    *     handler block for the {@code keys[i]} key.
    */

spring-core/src/main/java/org/springframework/asm/Opcodes.java

@@ -289,6 +289,7 @@ public interface Opcodes {
   int V22 = 0 << 16 | 66;
   int V23 = 0 << 16 | 67;
   int V24 = 0 << 16 | 68;
+  int V25 = 0 << 16 | 69;
 
   /**
    * Version flag indicating that the class is using 'preview' features.