fix: change gha version to SHA

[Jakub-Kwak]

CI-601 Using master as as version of 3rd party GitHub action is a potential security risk. We are changing from: uses: elastic/elastic-github-actions/elasticsearch@master to: uses: elastic/elastic-github-actions/elasticsearch@<SHA-key> What I did is just went to the repository, and got the latest SHA of the master. 3rd party GHA repositories changed within this PR:

• https://github.com/toptal/chewy

How to test

• Green check on this PR is enough

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