Update Codex CLI installation guide for clarity and completeness

Author: madeline-underwood

content/install-guides/codex-cli.md

@@ -16,9 +16,7 @@ tool_install: true
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-Codex CLI is a local, terminal-based coding agent from OpenAI that helps developers explore codebases, generate changes, and run commands using natural language.
-
-It’s useful for tasks such as understanding unfamiliar projects, refactoring code, and accelerating development workflows directly from the command line.
+Codex CLI is a local, terminal-based coding agent from OpenAI that helps developers explore codebases, generate changes, and run commands using natural language. It’s useful for tasks such as understanding unfamiliar projects, refactoring code, and accelerating development workflows directly from the command line.
 
 It supports multiple operating systems, including Arm-based Linux distributions and macOS. By integrating AI assistance directly into command-line workflows, it reduces context switching during development.