docs: update docs icons (#12465)

### What problem does this PR solve?

Update icons for docs.
Trailing spaces are auto truncated by the editor, does not affect real
content.

### Type of change

- [x] Documentation Update

docs/guides/dataset/enable_raptor.md

@@ -1,6 +1,9 @@
 ---
 sidebar_position: 7
 slug: /enable_raptor
+sidebar_custom_props: {
+  categoryIcon: LucideNetwork
+}
 ---
 
 # Enable RAPTOR
@@ -76,7 +79,7 @@ A random seed. Click **+** to change the seed value.
 ## Quickstart
 
 1. Navigate to the **Configuration** page of your dataset and update:
-   
+
    - Prompt: *Optional* - We recommend that you keep it as-is until you understand the mechanism behind.
    - Max token: *Optional*
    - Threshold: *Optional*
@@ -86,8 +89,8 @@ A random seed. Click **+** to change the seed value.
 
    *You can click the pause button in the dropdown to halt the build process when necessary.*
 
-3. Go back to the **Configuration** page:  
-   
+3. Go back to the **Configuration** page:
+
    *The **RAPTOR** field changes from `Not generated` to `Generated at a specific timestamp` when a RAPTOR hierarchical tree structure is generated. You can delete it by clicking the recycle bin button to the right of the field.*
 
 4. Once a RAPTOR hierarchical tree structure is generated, your chat assistant and **Retrieval** agent component will use it for retrieval as a default.