build: add proper search path for Windows #282

Job	Run time
Swift tests (swift:nightly-main jdk:Corretto os:jammy)	4m 29s
Swift tests (swift:nightly-main jdk:Corretto os:jammy)	4m 28s
Java tests (swift:nightly-main jdk:Corretto os:jammy)	5m 18s
Java tests (swift:nightly-main jdk:Corretto os:jammy)	5m 52s
soundness / Documentation check	34s
soundness / Documentation check	36s
soundness / Unacceptable language check	3s
soundness / Unacceptable language check	3s
soundness / License headers check	4s
soundness / License headers check	5s
soundness / Python lint check	5s
soundness / Python lint check	6s
soundness / API breakage check	0s
soundness / API breakage check	0s
soundness / Broken symlinks check	2s
soundness / Broken symlinks check	5s
soundness / Shell check	35s
soundness / Shell check	30s
soundness / YAML lint check	3s
soundness / YAML lint check	5s
soundness / Format check	0s
soundness / Format check	0s
	23m 3s

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