Fix sha256 url missing '/release/' to download kubectl

Author: zbbfufu

content/en/docs/tasks/tools/install-kubectl-linux.md

@@ -59,10 +59,10 @@ The following methods exist for installing kubectl on Linux:
 
    {{< tabs name="download_checksum_linux" >}}
    {{< tab name="x86-64" codelang="bash" >}}
-   curl -LO "https://dl.k8s.io/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/amd64/kubectl.sha256"
+   curl -LO "https://dl.k8s.io/release/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/amd64/kubectl.sha256"
    {{< /tab >}}
    {{< tab name="ARM64" codelang="bash" >}}
-   curl -LO "https://dl.k8s.io/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/arm64/kubectl.sha256"
+   curl -LO "https://dl.k8s.io/release/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/arm64/kubectl.sha256"
    {{< /tab >}}
    {{< /tabs >}}
 
@@ -263,10 +263,10 @@ Below are the procedures to set up autocompletion for Bash, Fish, and Zsh.
 
    {{< tabs name="download_convert_checksum_linux" >}}
    {{< tab name="x86-64" codelang="bash" >}}
-   curl -LO "https://dl.k8s.io/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/amd64/kubectl-convert.sha256"
+   curl -LO "https://dl.k8s.io/release/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/amd64/kubectl-convert.sha256"
    {{< /tab >}}
    {{< tab name="ARM64" codelang="bash" >}}
-   curl -LO "https://dl.k8s.io/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/arm64/kubectl-convert.sha256"
+   curl -LO "https://dl.k8s.io/release/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/arm64/kubectl-convert.sha256"
    {{< /tab >}}
    {{< /tabs >}}