update clusterctl version to v1.5.x in quick start

Author: nawazkh

docs/book/src/user/quick-start.md

@@ -161,17 +161,17 @@ If you are unsure you can determine your computers architecture by running `unam
 
 Download for AMD64:
 ```bash
-curl -L {{#releaselink gomodule:"sigs.k8s.io/cluster-api" asset:"clusterctl-linux-amd64" version:"1.4.x"}} -o clusterctl
+curl -L {{#releaselink gomodule:"sigs.k8s.io/cluster-api" asset:"clusterctl-linux-amd64" version:"1.5.x"}} -o clusterctl
 ```
 
 Download for ARM64:
 ```bash
-curl -L {{#releaselink gomodule:"sigs.k8s.io/cluster-api" asset:"clusterctl-linux-arm64" version:"1.4.x"}} -o clusterctl
+curl -L {{#releaselink gomodule:"sigs.k8s.io/cluster-api" asset:"clusterctl-linux-arm64" version:"1.5.x"}} -o clusterctl
 ```
 
 Download for PPC64LE:
 ```bash
-curl -L {{#releaselink gomodule:"sigs.k8s.io/cluster-api" asset:"clusterctl-linux-ppc64le" version:"1.4.x"}} -o clusterctl
+curl -L {{#releaselink gomodule:"sigs.k8s.io/cluster-api" asset:"clusterctl-linux-ppc64le" version:"1.5.x"}} -o clusterctl
 ```
 
 Install clusterctl:
@@ -191,12 +191,12 @@ If you are unsure you can determine your computers architecture by running `unam
 
 Download for AMD64:
 ```bash
-curl -L {{#releaselink gomodule:"sigs.k8s.io/cluster-api" asset:"clusterctl-darwin-amd64" version:"1.4.x"}} -o clusterctl
+curl -L {{#releaselink gomodule:"sigs.k8s.io/cluster-api" asset:"clusterctl-darwin-amd64" version:"1.5.x"}} -o clusterctl
 ```
 
 Download for M1 CPU ("Apple Silicon") / ARM64:
 ```bash
-curl -L {{#releaselink gomodule:"sigs.k8s.io/cluster-api" asset:"clusterctl-darwin-arm64" version:"1.4.x"}} -o clusterctl
+curl -L {{#releaselink gomodule:"sigs.k8s.io/cluster-api" asset:"clusterctl-darwin-arm64" version:"1.5.x"}} -o clusterctl
 ```
 
 Make the clusterctl binary executable.
@@ -235,7 +235,7 @@ Go to the working directory where you want clusterctl downloaded.
 
 Download the latest release; on Windows, type:
 ```powershell
-curl.exe -L {{#releaselink gomodule:"sigs.k8s.io/cluster-api" asset:"clusterctl-windows-amd64.exe" version:"1.4.x"}} -o clusterctl.exe
+curl.exe -L {{#releaselink gomodule:"sigs.k8s.io/cluster-api" asset:"clusterctl-windows-amd64.exe" version:"1.5.x"}} -o clusterctl.exe
 ```
 Append or prepend the path of that directory to the `PATH` environment variable.