Docs: minor (#12899)

### What problem does this PR solve?

Removed redundant command + "*the* current version" @JinHai-CN 

### Type of change

- [x] Documentation Update

docs/guides/agent/agent_component_reference/_category_.json

@@ -1,5 +1,5 @@
 {
-  "label": "Agent Components",
+  "label": "Components",
   "position": 20,
   "link": {
     "type": "generated-index",

docs/guides/agent/agent_introduction.md

@@ -5,7 +5,7 @@ sidebar_custom_props: {
   categoryIcon: LucideBookOpenText
 }
 ---
-# Introduction to agents
+# Introduction
 
 Key concepts, basic operations, a quick view of the agent editor.
 

docs/guides/agent/embed_agent_into_webpage.md

@@ -5,7 +5,7 @@ sidebar_custom_props: {
   categoryIcon: LucideMonitorDot
 }
 ---
-# Embed agent into webpage
+# Embed Agent into webpage
 
 You can use iframe to embed an agent into a third-party webpage.