chore(deps): Revert "chore(deps): update redhat-plumbers-in-action/differential-shellcheck digest to 929381c (#1206)"

[rm3l]

Description

For some reason, this dependency update is supposed to have fixed some
alerts that were displayed in Code Scanning. But these alerts seem to be
still relevant. So reverting so that the alerts can be reopened and so
that we can work on fixing those alerts (at least the most critical
ones).

This reverts commit 91f5b2c.

Which issue(s) does this PR fix or relate to

Relates to https://issues.redhat.com/browse/RHIDP-6780

PR acceptance criteria

• Tests
• Documentation

How to test changes / Special notes to the reviewer

[sourcery-ai]

Reviewer's Guide

This PR reverts the recent bump of the differential-shellcheck action in the CI workflow by restoring its prior commit hash, enabling the reopening of existing code scanning alerts for further triage.

File-Level Changes

Change	Details	Files
Revert differential-shellcheck version update in CI configuration	Changed action reference from newer digest back to original digest	.github/workflows/scripts-checks.yaml

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[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[sourcery-ai]

Hey @rm3l - I've reviewed your changes and they look great!

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