Update 02-client-tools.md : modified cfssl and cfssljson installation steps for Linux.

[networkandcode]

The existing steps were failing.

$ wget --show-progress --https-only --timestamping   https://storage.googleapis.com/kubernetes-the-hard-way
/cfssl/1.4.1/linux/cfssl   https://storage.googleapis.com/kubernetes-the-hard-way/cfssl/1.4.1/linux/cfssljson
--2024-11-04 06:51:49--  https://storage.googleapis.com/kubernetes-the-hard-way/cfssl/1.4.1/linux/cfssl
Resolving storage.googleapis.com (storage.googleapis.com)... 142.250.183.27, 142.250.183.155, 142.250.183.187, ...
Connecting to storage.googleapis.com (storage.googleapis.com)|142.250.183.27|:443... connected.
HTTP request sent, awaiting response... 403 Forbidden
2024-11-04 06:51:49 ERROR 403: Forbidden.

--2024-11-04 06:51:49--  https://storage.googleapis.com/kubernetes-the-hard-way/cfssl/1.4.1/linux/cfssljson
Reusing existing connection to storage.googleapis.com:443.
HTTP request sent, awaiting response... 403 Forbidden
2024-11-04 06:51:50 ERROR 403: Forbidden.

$ wget https://storage.googleapis.com/kubernetes-the-hard-way/cfssl/1.4.1/linux/cfssl   https://storage.goo
gleapis.com/kubernetes-the-hard-way/cfssl/1.4.1/linux/cfssljson
--2024-11-04 06:53:29--  https://storage.googleapis.com/kubernetes-the-hard-way/cfssl/1.4.1/linux/cfssl
Resolving storage.googleapis.com (storage.googleapis.com)... 142.250.183.155, 216.58.203.27, 216.58.203.59, ...
Connecting to storage.googleapis.com (storage.googleapis.com)|142.250.183.155|:443... connected.
HTTP request sent, awaiting response... 403 Forbidden
2024-11-04 06:53:29 ERROR 403: Forbidden.

--2024-11-04 06:53:29--  https://storage.googleapis.com/kubernetes-the-hard-way/cfssl/1.4.1/linux/cfssljson
Reusing existing connection to storage.googleapis.com:443.
HTTP request sent, awaiting response... 403 Forbidden
2024-11-04 06:53:30 ERROR 403: Forbidden.```