Use right publisher key

Signed-off-by: Juan Antonio Osorio <[email protected]>

Author: JAORMX

.github/workflows/build-and-publish.yml

@@ -149,7 +149,7 @@ jobs:
             jq -e '.data.servers[0].name' dist/official-registry.json > /dev/null
             echo "✅ Servers have name field"
             
-            jq -e '.data.servers[0]._meta.publisher' dist/official-registry.json > /dev/null
+            jq -e '.data.servers[0]._meta."io.modelcontextprotocol.registry/publisher-provided"' dist/official-registry.json > /dev/null
             echo "✅ Servers have _meta.publisher field"
             
             jq -e '.data.servers[0]._meta."io.modelcontextprotocol.registry"' dist/official-registry.json > /dev/null