docs: cleanup casing

LICENSE

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2025 OpenCode
+Copyright (c) 2025 opencode
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

packages/web/src/content/docs/docs/themes.mdx

@@ -272,9 +272,9 @@ The `defs` section (optional) allows you to define reusable colors that can be r
 
 ## Built-in Themes
 
-OpenCode comes with several built-in themes:
-- `opencode` - Default OpenCode theme
-- `tokyonight` - Tokyo Night theme
+opencode comes with several built-in themes:
+- `opencode` - Default opencode theme
+- `tokyonight` - Tokyonight theme
 - `everforest` - Everforest theme
 - `ayu` - Ayu dark theme
 - `catppuccin` - Catppuccin theme
@@ -285,7 +285,7 @@ OpenCode comes with several built-in themes:
 
 ## Using a Theme
 
-To use a theme, set it in your OpenCode configuration or select it from the theme dialog in the TUI.
+To use a theme, set it in your opencode configuration or select it from the theme dialog in the TUI.
 
 ```json title="opencode.json" {3}
 {