[CI] Merge script test fails due to missing dependency

[asfimport]

six is missing, perhaps github has updated the virtual environment of the hosted actions machines.

Reporter: Krisztian Szucs / @kszucs
Assignee: Krisztian Szucs / @kszucs

Related issues:

• [Dev] merge_arrow_pr.py depends on six (is duplicated by)

PRs and other links:

• GitHub Pull Request #10310

_{Note: This issue was originally created as ARROW-12772. Please see the migration documentation for further details.}

[asfimport]

Krisztian Szucs / @kszucs:
Issue resolved by pull request 10310
#10310