Fix scheduler's patch name

[n549]

Description

There was a typo in the name of the file with scheduler's patch: kube-scheduler_json.json instead of kube-scheduler+json.json

Fixes # (issue)

Solution

The typo is fixed.

How to apply

Test Cases

Deploy kubernetes with some kube-scheduler's customization, for example:

service:
  kubeadm_patches:
    scheduler:
    - groups: [control-plane]
      patch:
        log-flush-frequency: 20s 

ER: kube-scheduler's manifest at the master nodes contains the new log-flush-frequency duration value.

Checklist

• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• Integration CI passed
• Unit tests. If Yes list of new/changed tests with brief description
• There is no merge conflicts

Unit tests

Indicate new or changed unit tests and what they do, if any.