use base branch

Author: skarimo

.github/workflows/test.yml

@@ -176,4 +176,4 @@ jobs:
           repo: datadog-api-spec
           status: ${{ (needs.javadoc.result == 'cancelled' || needs.test.result == 'cancelled' || needs.examples.result == 'cancelled') && 'pending' || needs.javadoc.result == 'success' && needs.test.result == 'success' && needs.examples.result
             == 'success' && 'success' || 'failure' }}
-          context: unit
+          context: master/unit