Arthur: arthur-mbedtls-release-ci-testing

Change default value tag for TEST_BRANCH

Signed-off-by: Arthur She <arthur.she@linaro.org>
Change-Id: Ie8f46c27b143a1ecad4ca9cf0bdc82c36d0436a5
diff --git a/arthur-mbedtls-release-ci-testing.yaml b/arthur-mbedtls-release-ci-testing.yaml
index 0bda891..a83ad6a 100644
--- a/arthur-mbedtls-release-ci-testing.yaml
+++ b/arthur-mbedtls-release-ci-testing.yaml
@@ -111,7 +111,7 @@
         description: Branch or tag in https://github.com/arthur-she/mbedtls-test (forks are not supported)
         type: PT_BRANCH_TAG
         quickFilterEnabled: True
-        default: leo-mbedtls-open-ci-notify-github-staging-testing
+        defaultValue: leo-mbedtls-open-ci-notify-github-staging-testing
     pipeline-scm:
       lightweight-checkout: false
       scm: