Fix typo in cluster level description

[Naarcha-AWS]

This PR fixes a typo in the description for the cluster level parameter that caused a formatting error.

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[github-actions]

Changes Analysis

Commit SHA: 31fb814
Comparing To SHA: 22483a2

API Changes

Summary

└─┬Paths
  └─┬/_component_template/{name}
    ├─┬PUT
    │ └─┬Parameters
    │   └──[🔀] description (18422:20)
    └─┬POST
      └─┬Parameters
        └──[🔀] description (18422:20)

Document Element	Total Changes	Breaking Changes
paths	2	0

• Total Changes: 2
• Modifications: 2

Report

The full API changes report is available at: https://github.com/opensearch-project/opensearch-api-specification/actions/runs/13334043568/artifacts/2594026770

API Coverage

	Before	After	Δ
Covered (%)	663 (64.94 %)	663 (64.94 %)	0 (0 %)
Uncovered (%)	358 (35.06 %)	358 (35.06 %)	0 (0 %)
Unknown	45	45	0

[github-actions]

Spec Test Coverage Analysis

Total	Tested
595	593 (99.66 %)