Fix syntax error in docs/conf.py - missing closing brace

- Add missing closing brace for sphinx_gallery_conf dictionary
- Resolves Read the Docs build failure with SyntaxError

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: jeremymanning

docs/conf.py

@@ -252,3 +252,4 @@
         '../examples/precog.py': 'images/thumb/sphx_glr_precog_thumb.gif',
         '../examples/save_movie.py': 'images/thumb/sphx_glr_save_movie_thumb.gif',
     }
+}