docs: link the Codex OpenAI column to the specific plugin listing (#50)

* docs: add the ChatGPT-auth Codex marketplace command

OpenAI Product confirmed the two Codex auth modes use different marketplaces today, with no single command that works across both. The prior note pointed ChatGPT-authenticated users only to /plugins; document the explicit command too: crowdstrike-falcon-fusion@openai-curated (ChatGPT) alongside crowdstrike-falcon-fusion@openai-api-curated (API-key / Amazon Bedrock).

* docs: link the Codex OpenAI column to the specific plugin listing

Point the OpenAI marketplace link at the plugin's own chatgpt.com listing instead of the generic /plugins directory, matching how the Cursor and Copilot rows link to their specific listings.

* docs: ChatGPT Codex path is /plugins search only (openai-curated not populated)

The openai-curated CLI marketplace used by ChatGPT-authenticated Codex does not list these plugins yet (verified: 'plugin ... was not found in marketplace openai-curated'), so drop the non-working @openai-curated command and keep the verified /plugins search path for that auth mode.

* docs: drop the openai-curated parenthetical from the Codex note

* docs: use paragraph-style prose for the Codex install note

Author: mraible

README.md

@@ -21,7 +21,7 @@ AI coding assistant skills for building [CrowdStrike Falcon Fusion](https://www.
 | Assistant | Command | Marketplace |
 |-----------|---------|-------------|
 | Claude Code | `/plugin install crowdstrike-falcon-fusion` | [Anthropic](https://github.com/anthropics/claude-plugins-official) |
-| Codex | `codex plugin add crowdstrike-falcon-fusion@openai-api-curated` | [OpenAI](https://chatgpt.com/plugins) |
+| Codex | `codex plugin add crowdstrike-falcon-fusion@openai-api-curated` | [OpenAI](https://chatgpt.com/plugins/plugins_6a8f7048ed7881918bf5b79011fe2b5e) |
 | Copilot CLI | `copilot plugin install CrowdStrike/fusion-skills` | [GitHub](https://awesome-copilot.github.com/plugin/crowdstrike-falcon-fusion/) |
 | Cursor | `/plugins` (CLI) or `/add-plugin crowdstrike-falcon-fusion` (IDE) | [Cursor](https://cursor.com/marketplace/crowdstrike/crowdstrike-falcon-fusion) |
 | Antigravity CLI | `agy plugin install https://github.com/CrowdStrike/fusion-skills` | [Google](https://antigravity.google/docs/plugins) |