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/ar/enterprise/guides/enable-crew-studio.mdx

@@ -146,7 +146,6 @@ Crew Studio هو طريقة مبتكرة لإنشاء طواقم وكلاء ال
 
   </Step>
 
-{" "}
 <Step title="الإجابة على الأسئلة">
   أجب على أسئلة التوضيح من مساعد الطاقم لتنقيح
   متطلباتك.
@@ -161,12 +160,10 @@ Crew Studio هو طريقة مبتكرة لإنشاء طواقم وكلاء ال
 
   </Step>
 
-{" "}
 <Step title="الموافقة أو التعديل">
   وافق على الخطة أو اطلب تغييرات إذا لزم الأمر.
 </Step>
 
-{" "}
 <Step title="التنزيل أو النشر">
   نزّل الكود للتخصيص أو انشر مباشرة على المنصة.
 </Step>

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

@@ -802,7 +802,6 @@ 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
@@ -810,7 +809,6 @@ 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