update download URL from pingcap.org to pingcap.com (pingcap#3039)

Author: Oreoxmt

en/pd-recover.md

@@ -14,7 +14,7 @@ PD Recover is a disaster recovery tool of [PD](https://docs.pingcap.com/tidb/sta
     {{< copyable "shell-regular" >}}
 
     ```shell
-    wget https://download.pingcap.org/tidb-community-toolkit-${version}-linux-amd64.tar.gz
+    wget https://download.pingcap.com/tidb-community-toolkit-${version}-linux-amd64.tar.gz
     ```
 
     In the command above, `${version}` is the version of the TiDB cluster, such as `v6.1.0`.

en/use-tkctl.md

@@ -17,9 +17,9 @@ To install `tkctl`, you can download the pre-built binary or build `tkctl` from
 
 ### Download the latest pre-built binary
 
-- [MacOS](https://download.pingcap.org/tkctl-darwin-amd64-latest.tgz)
-- [Linux](https://download.pingcap.org/tkctl-linux-amd64-latest.tgz)
-- [Windows](https://download.pingcap.org/tkctl-windows-amd64-latest.tgz)
+- [macOS](https://download.pingcap.com/tkctl-darwin-amd64-latest.tgz)
+- [Linux](https://download.pingcap.com/tkctl-linux-amd64-latest.tgz)
+- [Windows](https://download.pingcap.com/tkctl-windows-amd64-latest.tgz)
 
 After unzipping the downloaded file, you can add the `tkctl` executable file to your `PATH` to finish the installation.
 

zh/pd-recover.md

@@ -14,7 +14,7 @@ PD Recover 是对 PD 进行灾难性恢复的工具，用于恢复无法正常
     {{< copyable "shell-regular" >}}
 
     ```shell
-    wget https://download.pingcap.org/tidb-community-toolkit-${version}-linux-amd64.tar.gz
+    wget https://download.pingcap.com/tidb-community-toolkit-${version}-linux-amd64.tar.gz
     ```
 
     `${version}` 是 TiDB 集群版本，例如，`v6.1.0`。

zh/use-tkctl.md

@@ -17,9 +17,9 @@ summary: 介绍如何使用 tkctl 命令行工具来运维集群和诊断集群
 
 ### 下载预编译的可执行文件
 
-- [MacOS](https://download.pingcap.org/tkctl-darwin-amd64-latest.tgz)
-- [Linux](https://download.pingcap.org/tkctl-linux-amd64-latest.tgz)
-- [Windows](https://download.pingcap.org/tkctl-windows-amd64-latest.tgz)
+- [macOS](https://download.pingcap.com/tkctl-darwin-amd64-latest.tgz)
+- [Linux](https://download.pingcap.com/tkctl-linux-amd64-latest.tgz)
+- [Windows](https://download.pingcap.com/tkctl-windows-amd64-latest.tgz)
 
 下载解压后，将 `tkctl` 可执行文件加入到可执行文件路径 (`PATH`) 中即完成安装。