WSL: fix downloader plugin #2318

Job	Run time
lint	18s
coverage	4m 37s
unit-tests (ubuntu-latest, dash, 4)	2m 15s
integration-tests (ubuntu-latest, dash, 4)	1m 34s
unit-tests (windows-latest, bash, 1)	10m 2s
unit-tests (windows-latest, cygwin, 1)	6m 48s
unit-tests (windows-latest, wsl, 4)	6m 45s
unit-tests (macos-latest, bash 3.2, 4)	3m 8s
unit-tests (macos-latest, bash 3.2 with coreutils, 4)	2m 53s
unit-tests (ubuntu-latest, registry.access.redhat.com/ubi8/ubi-minimal, bash 4.4, 4)	2m 20s
unit-tests (ubuntu-latest, alpine, zsh, 4)	2m 12s
unit-tests (ubuntu-latest, alpine, ash, 4)	2m 4s
unit-tests (ubuntu-latest, ubuntu:22.04, posh, 4)	2m 23s
report	4s
	47m 23s

Provide feedback