Fix path separators in build-msi.sh for consistency across platforms #148

Job	Run time
generate-build-number	2s
app-docker-image-deploy	32s
accounts-docker-image-deploy	25s
admin-dashboard-docker-image-deploy	26s
api-reference-docker-image-deploy	32s
copilot-docker-image-deploy	31s
dashboard-docker-image-deploy	25s
docs-docker-image-deploy	25s
e2e-docker-image-deploy	26s
fluent-ingest-docker-image-deploy	29s
haraka-docker-image-deploy	32s
home-docker-image-deploy	26s
incoming-request-ingest-docker-image-deploy	31s
infrastructure-agent-deploy	2m 35s
isolated-vm-docker-image-deploy	26s
llm-docker-image-deploy	2m 43s
nginx-docker-image-deploy	32s
open-telemetry-ingest-docker-image-deploy	26s
otel-collector-docker-image-deploy	24s
probe-docker-image-deploy	25s
probe-ingest-docker-image-deploy	30s
status-page-docker-image-deploy	40s
test-docker-image-deploy	39s
test-server-docker-image-deploy	37s
worker-docker-image-deploy	27s
workflow-docker-image-deploy	25s
test-helm-chart	0s
test-e2e-test-saas	0s
test-e2e-test-self-hosted	0s
	16m 31s

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