Updated version pattern matching in quick-start

The old `1.0.x` wasn't matching the new version. Instead of making the
change now for each new minor release this will match all minor and
patch releases.

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

@@ -101,7 +101,10 @@ The clusterctl CLI tool handles the lifecycle of a Cluster API management cluste
 #### Install clusterctl binary with curl on linux
 Download the latest release; on linux, type:
 ```
-curl -L {{#releaselink gomodule:"sigs.k8s.io/cluster-api" asset:"clusterctl-linux-amd64" version:"1.0.x"}} -o clusterctl
+curl -L {{#releaselink gomodule:"sigs.k8s.io/cluster-api" asset:"clusterctl-linux-amd64" version:"1.x" 
+prereleases:"true"
+}} -o 
+clusterctl
 ```
 Make the clusterctl binary executable.
 ```
@@ -122,12 +125,12 @@ clusterctl version
 #### Install clusterctl binary with curl on macOS
 Download the latest release; on macOS, type:
 ```
-curl -L {{#releaselink gomodule:"sigs.k8s.io/cluster-api" asset:"clusterctl-darwin-amd64" version:"1.0.x"}} -o clusterctl
+curl -L {{#releaselink gomodule:"sigs.k8s.io/cluster-api" asset:"clusterctl-darwin-amd64" version:"1.x"}} -o clusterctl
 ```
 
 Or if your Mac has an M1 CPU ("Apple Silicon"):
 ```
-curl -L {{#releaselink gomodule:"sigs.k8s.io/cluster-api" asset:"clusterctl-darwin-arm64" version:"1.0.x"}} -o clusterctl
+curl -L {{#releaselink gomodule:"sigs.k8s.io/cluster-api" asset:"clusterctl-darwin-arm64" version:"1.x"}} -o clusterctl
 ```
 
 Make the clusterctl binary executable.