add candidate for builder

Author: StFroese

myst_nb/ext/glue/crossref.py

@@ -150,7 +150,7 @@ def generate_any_nodes(
 
             uri = os.path.relpath(filepath, page_dir)
             image_node = nodes.image(uri=uri)
-            image_node["candidates"] = {None: uri}
+            image_node["candidates"] = {None: uri, builder.name: uri}
 
             return [image_node]