prepend 'journal/' to resolved files

this is where the markdown files will go inside the instance dir

incorporealcms/journal.py

@@ -20,5 +20,5 @@ def journal_file_resolver(path):
     """
     if path.endswith('/'):
         path = f'{path}index'
-    path = f'{path}.md'
+    path = f'journal/{path}.md'
     return path