Fix snippet URL resolved against bblock files_path instead of output dir

Author: avillar

ogc/bblocks/postprocess.py

@@ -219,7 +219,7 @@ def do_postprocess(bblock: BuildingBlock, light: bool = False) -> bool:
                     path = snippet.pop('path', None)
                     if base_url:
                         if path:
-                            snippet['url'] = PathOrUrl(bblock.files_path).resolve_ref(path).with_base_url(base_url, cwd)
+                            snippet['url'] = PathOrUrl(path).with_base_url(base_url, cwd)
                         if ref := snippet.get('ref'):
                             snippet['ref'] = PathOrUrl(bblock.files_path).resolve_ref(ref).with_base_url(base_url, cwd)