docs: remove {" "} JSX expressions breaking <Steps> render (#5857)

## Overview

Prettier-inserted bare `{" "}` lines between sibling `<Step>` elements caused Mintlify's `<Steps>` to crash with "Cannot read properties of undefined (reading 'stepNumber')", leaving the page body blank.

### Affected pages (en/ar/ko/pt-BR):
- enterprise/guides/enable-crew-studio
- learn/llm-selection-guide

docs/en/enterprise/guides/enable-crew-studio.mdx

@@ -146,7 +146,6 @@ Here's a typical workflow for creating a crew with Crew Studio:
 
   </Step>
 
-{" "}
 <Step title="Answer Questions">
   Respond to clarifying questions from the Crew Assistant to refine your
   requirements.
@@ -161,12 +160,10 @@ Here's a typical workflow for creating a crew with Crew Studio:
 
   </Step>
 
-{" "}
 <Step title="Approve or Modify">
   Approve the plan or request changes if necessary.
 </Step>
 
-{" "}
 <Step title="Download or Deploy">
   Download the code for customization or deploy directly to the platform.
 </Step>

docs/en/learn/llm-selection-guide.mdx

@@ -805,7 +805,6 @@ The tables below show a representative sample of current top-performing models a
     Begin with well-established models like **GPT-4.1**, **Claude 3.7 Sonnet**, or **Gemini 2.0 Flash** that offer good performance across multiple dimensions and have extensive real-world validation.
   </Step>
 
-{" "}
 <Step title="Identify Specialized Needs">
   Determine if your crew has specific requirements (coding, reasoning, speed)
   that would benefit from specialized models like **Claude 4 Sonnet** for
@@ -813,7 +812,6 @@ The tables below show a representative sample of current top-performing models a
   consider fast inference providers like **Groq** alongside model selection.
 </Step>
 
-{" "}
 <Step title="Implement Multi-Model Strategy">
   Use different models for different agents based on their roles.
   High-capability models for managers and complex tasks, efficient models for