docs: copy button copies too much info

[utdrmac]

Description

https://docs.percona.com/percona-monitoring-and-management/3/install-pmm/install-pmm-server/deployment-options/helm/index.html#install-pmm-server-on-your-kubernetes-clusteropenshift-clusters

Step #1 'Create Kubernetes secret to set up pmm-admin password' copies too much info into the clipboard that does not allow for simple copy/paste into terminal. Looks like this step should be two parts. Step 1, create the password using base64, then step 2, create the yml with the encoded password.

Expected Results

For copy/paste to be accurate and work without modification

Actual Results

Too much is copied and doesn't work

Version

N/A

Steps to reproduce

Follow docs steps

Relevant logs

Code of Conduct

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