feat: add "gpt-5.4" to codex allowed models list (#16274)

Author: msadiks

packages/opencode/src/plugin/codex.ts

@@ -362,6 +362,7 @@ export async function CodexAuthPlugin(input: PluginInput): Promise<Hooks> {
           "gpt-5.1-codex-max",
           "gpt-5.1-codex-mini",
           "gpt-5.2",
+          "gpt-5.4",
           "gpt-5.2-codex",
           "gpt-5.3-codex",
           "gpt-5.1-codex",