fix: remove redundant #main from linearDocument union refs

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: s-adamantine

lexicons/org/hypercerts/claim/activity.json

@@ -33,7 +33,7 @@
             "type": "union",
             "refs": [
               "org.hypercerts.defs#descriptionString",
-              "pub.leaflet.pages.linearDocument#main",
+              "pub.leaflet.pages.linearDocument",
               "com.atproto.repo.strongRef"
             ],
             "description": "Long-form description of the activity. An inline string for plain text or markdown, a Leaflet linear document for rich-text content, or a strong reference to an external description record."

lexicons/org/hypercerts/collection.json

@@ -40,7 +40,7 @@
             "type": "union",
             "refs": [
               "org.hypercerts.defs#descriptionString",
-              "pub.leaflet.pages.linearDocument#main",
+              "pub.leaflet.pages.linearDocument",
               "com.atproto.repo.strongRef"
             ],
             "description": "Long-form description of the collection. An inline string for plain text or markdown, a Leaflet linear document for rich-text content, or a strong reference to an external description record."

lexicons/org/hypercerts/context/attachment.json

@@ -66,7 +66,7 @@
             "type": "union",
             "refs": [
               "org.hypercerts.defs#descriptionString",
-              "pub.leaflet.pages.linearDocument#main",
+              "pub.leaflet.pages.linearDocument",
               "com.atproto.repo.strongRef"
             ],
             "description": "Long-form description of the attachment. An inline string for plain text or markdown, a Leaflet linear document for rich-text content, or a strong reference to an external description record."