Add new line at end of gating.yaml

Author: aaradhak

gating.yaml

@@ -4,4 +4,4 @@ product_versions:
 decision_context: osci_compose_gate
 rules:
   - !PassingTestCaseRule {test_case_name: osci.brew-build.tier0.functional}
-  - !PassingTestCaseRule {test_case_name: osci.brew-build.tier0.gating} 
+  - !PassingTestCaseRule {test_case_name: osci.brew-build.tier0.gating}