Upgrade to Jetty 12.1.1

Closes gh-47131

module/spring-boot-jetty/src/main/java/org/springframework/boot/jetty/JettyHandlerWrappers.java

@@ -36,6 +36,7 @@ final class JettyHandlerWrappers {
 	private JettyHandlerWrappers() {
 	}
 
+	@SuppressWarnings("removal")
 	static Handler.Wrapper createGzipHandlerWrapper(Compression compression) {
 		GzipHandler handler = new GzipHandler();
 		handler.setMinGzipSize((int) compression.getMinResponseSize().toBytes());

platform/spring-boot-dependencies/build.gradle

@@ -1005,7 +1005,7 @@ bom {
 			]
 		}
 	}
-	library("Jetty", "12.1.0") {
+	library("Jetty", "12.1.1") {
 		prohibit {
 			contains ".alpha"
 			because "we don't want alpha dependencies"