build(deps-dev): Bump tar from 7.5.6 to 7.5.7 (#1288)

Resolves alerts for several security advisories such as:
GHSA-34x7-hfp2-rc4v

As per our assessment those vulnerabilities are not exploitable in the
context of UI5 CLI. The affected versions of tar are used in dev
dependencies only.

Author: d3xter666