Merge pull request #21755 from taosdata/docs/dclow

docs: minor updates to 3.0 english docs

docs/en/05-get-started/index.md

@@ -21,17 +21,6 @@ import {useCurrentSidebarCategory} from '@docusaurus/theme-common';
 <DocCardList items={useCurrentSidebarCategory().items}/>
 ```
 
-## Study TDengine Knowledge Map
-
-The TDengine Knowledge Map covers the various knowledge points of TDengine, revealing the invocation relationships and data flow between various conceptual entities. Learning and understanding the TDengine Knowledge Map will help you quickly master the TDengine knowledge system.
-
-<figure>
-<center>
-<a href="pathname:///img/tdengine-map.svg" target="_blank"><img src="/img/tdengine-map.svg" width="80%" /></a>
-<figcaption>Diagram 1. TDengine Knowledge Map</figcaption>
-</center>
-</figure>
-
 ## Join TDengine Community
 
 <table width="100%">

docs/en/28-releases/01-tdengine.md

@@ -6,7 +6,7 @@ description: This document provides download links for all released versions of
 
 TDengine 3.x installation packages can be downloaded at the following links:
 
-For TDengine 2.x installation packages by version, please visit [here](https://www.taosdata.com/all-downloads).
+For TDengine 2.x installation packages by version, please visit [here](https://tdengine.com/downloads/historical/).
 
 import Release from "/components/ReleaseV3";