Convert switch statements to expressions

Converts the decodeBoolean method switch statement to use Java 17
switch expressions, making the code more concise and eliminating
the need for break statements.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: oschwald

src/main/java/com/maxmind/db/Decoder.java

@@ -259,16 +259,13 @@ private float decodeFloat(int size) throws InvalidDatabaseException {
 
     private static boolean decodeBoolean(int size)
         throws InvalidDatabaseException {
-        switch (size) {
-            case 0:
-                return false;
-            case 1:
-                return true;
-            default:
-                throw new InvalidDatabaseException(
-                    "The MaxMind DB file's data section contains bad data: "
-                        + "invalid size of boolean.");
-        }
+        return switch (size) {
+            case 0 -> false;
+            case 1 -> true;
+            default -> throw new InvalidDatabaseException(
+                "The MaxMind DB file's data section contains bad data: "
+                    + "invalid size of boolean.");
+        };
     }
 
     private <T, V> List<V> decodeArray(