Grant packages write permission to the job token

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01XqsmB8BBnudp4djsjWpk11

.gitea/workflows/convert.yaml

@@ -9,6 +9,10 @@ on:
       - '**'
   workflow_dispatch:
 
+permissions:
+  contents: write
+  packages: write
+
 env:
   GPKG: ca0fd5c0-8146-11e9-9012-482ae30f98d9_geopackage+sqlite3_3812.gpkg
   SOURCE_URL: https://ac.ngi.be/remoteclient-open/GeoBePartners-open/BOSA/ca0fd5c0-8146-11e9-9012-482ae30f98d9_geopackage+sqlite3_3812.zip