Fix: Fix `-Pull` test in `Generate-GitBranches.Tests.ps1` #622

Job	Run time
test-build-srcds	1m 5s
test-game-image-game-version	3s
test-build-hlds	2m 0s
test-generate-gitbranches	25s
dockerhub-description-srcds	0s
update-draft-release	0s
dockerhub-description-hlds	0s
publish-draft-release	0s
	3m 33s

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