Update fleeting plugin dependency

Stan Hurequested to merge
sh-fix-fips-autoscaler-ssh into 18-2-stable

What does this MR do?

This backports !5776 (merged) to 18-2-stable.

This is needed to fix SSH connections on FIPS systems: gitlab-org/fleeting/fleeting!56 (merged)

Relates to #38963 (closed)

This resolves the conflicts to prepare for 18-2-stable: https://gitlab.com/gitlab-com/runner-group/team-tasks/-/issues/403#note_2687882665

Edited by Stan Hu

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