Add schema for debian/upstream/metadata

Closes: #4945

Author: nthykier

src/api/json/catalog.json

@@ -1308,6 +1308,12 @@
       ],
       "url": "https://raw.githubusercontent.com/dbt-labs/dbt-jsonschema/main/schemas/latest/dbt_yml_files-latest.json"
     },
+    {
+      "name": "Debian Upstream Metadata file",
+      "description": "Debian packaging file for describing metadata about the upstream project",
+      "fileMatch": ["**/debian/upstream/metadata"],
+      "url": "https://salsa.debian.org/debian/debian-json-schemas/-/raw/main/schemas/debian-upstream-metadata/debian-upstream-metadata-latest.json"
+    },
     {
       "name": "Deck config",
       "description": "Deck is a tool for creating presentation using Markdown and Google Slides",