Enable JXL imageformat support, it is exposed by element-desktop.

--- a/third_party/blink/common/features.cc
+++ b/third_party/blink/common/features.cc
@@ -767,7 +767,7 @@
                                                          "delay-in-ms", 0};
 
 // Enables the JPEG XL Image File Format (JXL).
-BASE_FEATURE(kJXL, "JXL", base::FEATURE_DISABLED_BY_DEFAULT);
+BASE_FEATURE(kJXL, "JXL", base::FEATURE_ENABLED_BY_DEFAULT);
 
 // Make all pending 'display: auto' web fonts enter the swap or failure period
 // immediately before reaching the LCP time limit (~2500ms), so that web fonts