Docs: don't render files in includes/, they're for embedding only (GH-103313)

(cherry picked from commit 280bd53)

Co-authored-by: Hugo van Kemenade <hugovk@users.noreply.github.com>

Author: miss-islington

Doc/conf.py

@@ -63,8 +63,10 @@
 # Minimum version of sphinx required
 needs_sphinx = '3.2'
 
+# Ignore any .rst files in the includes/ directory;
+# they're embedded in pages but not rendered individually.
 # Ignore any .rst files in the venv/ directory.
-exclude_patterns = ['venv/*', 'README.rst']
+exclude_patterns = ['includes/*.rst', 'venv/*', 'README.rst']
 venvdir = os.getenv('VENVDIR')
 if venvdir is not None:
     exclude_patterns.append(venvdir + '/*')