fix : Update Splunk matrix version in reusable build/test/release wor…

[rasteja]

…kflow

Description

(PR description goes here)

Checklist

• README.md has been updated or is not required
• push trigger tests
• manual release test
• automated releases test
• pull request trigger tests
• schedule trigger tests
• workflow errors/warnings reviewed and addressed

Testing done

(for each selected checkbox, the corresponding test results link should be listed here)

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[github-actions]

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