doc: document lack of wildcard support in default extract pattern

Fixes borgbackup#8589

docs/usage/extract.rst.inc

@@ -119,4 +119,8 @@ pass over the archive metadata.
 
     When parent directories are not extracted (because of using file/directory selection
     or any other reason), borg can not restore parent directories' metadata, e.g. owner,
-    group, permission, etc.
+    group, permission, etc.
+
+    The default interpretation for the paths to extract is `pp:` which is a literal
+    path-prefix match. If you want to use e.g. a wildcard, you must select a different
+    pattern style such as `sh:` or `fm:`. See :ref:`borg_patterns` for more information.