revert white-space changes in docs (#12557)

### What problem does this PR solve?

Trailing white-spaces in commit 6814ace1aa
got automatically trimmed by code editor may causes documentation
typesetting broken.

Mostly for double spaces for soft line breaks.  

### Type of change

- [x] Documentation Update

docs/guides/agent/agent_component_reference/begin.mdx

@@ -5,7 +5,6 @@ sidebar_custom_props: {
   categoryIcon: LucideHome
 }
 ---
-
 # Begin component
 
 The starting component in a workflow.
@@ -39,9 +38,9 @@ An agent in conversational mode begins with an opening greeting. It is the agent
 
 You can define global variables within the **Begin** component, which can be either mandatory or optional. Once set, users will need to provide values for these variables when engaging with the agent. Click **+ Add variable** to add a global variable, each with the following attributes:
 
-- **Name**: _Required_
-  A descriptive name providing additional details about the variable.
-- **Type**: _Required_
+- **Name**: _Required_  
+  A descriptive name providing additional details about the variable.  
+- **Type**: _Required_  
   The type of the variable:
   - **Single-line text**: Accepts a single line of text without line breaks.
   - **Paragraph text**: Accepts multiple lines of text, including line breaks.
@@ -49,7 +48,7 @@ You can define global variables within the **Begin** component, which can be eit
   - **file upload**: Requires the user to upload one or multiple files.
   - **Number**: Accepts a number as input.
   - **Boolean**: Requires the user to toggle between on and off.
-- **Key**: _Required_
+- **Key**: _Required_  
   The unique variable name.
 - **Optional**: A toggle indicating whether the variable is optional.