Patch test in `term_operator_version_parsing.t`

[atreyasha]

Checklist

• [x] No duplicate issues/PRs
• [x] Update usage function
• [x] Update unit tests
• [x] Update shell completions
• [x] Update mandoc
• [x] Update readme
• [x] Update locales
• [x] Update change log, if releasing
• [x] Update DOWNGRADE_VERSION, if releasing

Description

A test for the =~ operator was missing, so just updating it with this PR.