[conf] Fix exclude_patterns

Author: SilverRainZ

conf.py

@@ -73,7 +73,7 @@
 # List of patterns, relative to source directory, that match files and
 # directories to ignore when looking for source files.
 # This pattern also affects html_static_path and html_extra_path.
-exclude_patterns = ['_assets', '_images', 'README.rst']
+exclude_patterns = ['_assets', '_images', '**/README.rst']
 
 # A string of reStructuredText that will be included at the end of every
 # source file that is read.