Fix issue [#19314], resolve the absence of the sed command in ub…

[andibraeu]

…i-micro by replacing it with echo.

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contributions to the project maintainers under the Apache 2 license.

Description

resolve the absence of the sed command in ubi-micro by replacing it with echo.

Motivation and Context

fix issue #19314

How to test this PR?

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Optimization (provides speedup with no functional changes)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• Fixes a regression (If yes, please add commit-id or PR # here)
• Unit tests added/updated
• Internal documentation updated
• Create a documentation update request here

[klauspost]

LGTM