Fix redirect condition for preload script

[olexii4]

Signed-off-by: Oleksii Orel [email protected]

What does this PR do?

Fix redirect condition for preload script.

What issues does this PR fix or reference?

It needs for eclipse-che/che#20599 (comment)

[che-bot]

Click here to review and test in web IDE:

[github-actions]

Docker image build succeeded: quay.io/eclipse/che-dashboard:pr-526

[openshift-ci]

@olexii4: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/v8-dashboard-happy-path	44d7663	link	true	/test v8-dashboard-happy-path

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[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: ibuziuk, olexii4

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