docs: bump Kubespray version from v2.24.1 to v2.26.0

Updated recommended Kubespray version in provider build docs to v2.26.0.
v2.24.1 is likely unmaintained as of April 2025, while v2.26.0 is more
current, better supported, and aligned with recent Kubernetes versions.

Author: Andrey Arapov

src/content/Docs/providers/build-a-cloud-provider/akash-cli/kubernetes-cluster-for-akash-providers/kubernetes-cluster-for-akash-providers/index.md

@@ -101,12 +101,12 @@ We recommend installing Kubespray on Ubuntu 22.04. Versions prior it Ubuntu 20.X
 
 Obtain Kubespray and navigate into the created local directory:
 
-> NOTE: It is recommended to try a newer version of Kubespray than `v2.24.1` -- https://github.com/kubernetes-sigs/kubespray/releases  
+> NOTE: It is recommended to try a newer version of Kubespray than `v2.26.0` -- https://github.com/kubernetes-sigs/kubespray/releases  
 
 ```
 cd ~
 
-git clone -b v2.24.1 --depth=1 https://github.com/kubernetes-sigs/kubespray.git
+git clone -b v2.26.0 --depth=1 https://github.com/kubernetes-sigs/kubespray.git
 
 cd kubespray
 ```