Update version for get-helm link

Signed-off-by: Guido Schmechel <[email protected]>

Author: ayacoo

docs/intro/install.mdx

@@ -37,7 +37,7 @@ the community requesting Helm for the OS in question.
 
 Helm now has an installer script that will automatically grab the latest version
 of Helm and [install it
-locally](https://raw.githubusercontent.com/helm/helm/main/scripts/get-helm-3).
+locally](https://raw.githubusercontent.com/helm/helm/main/scripts/get-helm-4).
 
 You can fetch that script, and then execute it locally. It's well documented so
 that you can read through it and understand what it is doing before you run it.