Remove the command to delete the opensearch_dashboard.yml file

[JuanGarriuz]

Description

This PR removes the instruction to delete the OpenSearch Dashboard configuration file manually. It only keeps the upgrade command

Evidence

Checks

Docs building

• Compiles without warnings.

Code formatting and web optimization

• Uses three spaces indentation.
• Adds or updates meta descriptions accordingly.
• Updates the redirects.js script if necessary (check this guide).

Writing style

• Uses present tense, active voice, and semi-formal registry.
• Uses short, simple sentences.
• Uses bold for user interface elements, italics for key terms or emphasis, and code font for Bash commands, file names, REST paths, and code.

[chantal-kelm]

[JuanGarriuz]

Changed branch name =>

• Remove the command to delete the opensearch_dashboard.yml file #7777