Update 15 files

- /docs/dissection/02-muscles.md
- /docs/images/muscles/3d_idea.png
- /docs/images/muscles/3d_mix.png
- /docs/images/muscles/back_01.png
- /docs/images/muscles/back_02.png
- /docs/images/muscles/dress_pattern.png
- /docs/images/muscles/dress_sewing.png
- /docs/images/muscles/dye_prep.png
- /docs/images/muscles/madder_dye.png
- /docs/images/muscles/muscles_back.png
- /docs/images/muscles/muscles_file.png
- /docs/images/muscles/muscles_ground.png
- /docs/images/muscles/muscles_names.png
- /docs/images/muscles/muscles01.png
- /docs/images/muscles/muscles02.png