[data] Update spec info

Author: fetch-info bot

index.json

@@ -10899,7 +10899,7 @@
       }
     ],
     "title": "Information technology — Digital compression and coding of continuous-tone still images: JPEG File Interchange Format (JFIF) — Part 5:",
-    "source": "iso",
+    "source": "spec",
     "categories": [
       "browser"
     ],
@@ -10924,7 +10924,7 @@
       }
     ],
     "title": "Information technology — JPEG XL image coding system — Part 2: File format",
-    "source": "iso",
+    "source": "spec",
     "categories": [
       "browser"
     ],
@@ -10949,7 +10949,7 @@
       }
     ],
     "title": "Information technology — Coding of audio-visual objects — Part 22: Open font format",
-    "source": "iso",
+    "source": "spec",
     "categories": [
       "browser"
     ],