Add JPEG XL to the package keywords

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Lfv41PqHEGbU7SLg5onpG1

Author: matmen

package.json

@@ -53,6 +53,8 @@
     "webp",
     "avif",
     "av1",
+    "jxl",
+    "jpeg xl",
     "apng",
     "tiff",
     "tga",