sbom_test - use UTC

Test: TreeHugger, m compliance_sbom
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: Id2abec8537a1dfa32d6816da4c34c86f46313086
diff --git a/tools/compliance/cmd/sbom/sbom_test.go b/tools/compliance/cmd/sbom/sbom_test.go
index 5e70580..6b40a27 100644
--- a/tools/compliance/cmd/sbom/sbom_test.go
+++ b/tools/compliance/cmd/sbom/sbom_test.go
@@ -1506,7 +1506,7 @@
 }
 
 func fakeTime() time.Time {
-	return time.UnixMicro(0)
+	return time.UnixMicro(0).UTC()
 }
 
 type spdxCreatedTime struct{}