nigntly-job: shift to 12AM UTC

Shift the nightly job to a quieter time slot.

Signed-off-by: Arthur She <arthur.she@linaro.org>
Change-Id: Ib6d0e97e9c14c5d746a0e8ee0da61e08534ca301
diff --git a/mbed-tls-nightly-tests.yaml b/mbed-tls-nightly-tests.yaml
index 3d34cbf..b59444f 100644
--- a/mbed-tls-nightly-tests.yaml
+++ b/mbed-tls-nightly-tests.yaml
@@ -132,4 +132,4 @@
         properties-content: GIT_CREDENTIALS_ID=mbedtls-github-token
     triggers:
     - parameterized-timer:
-        cron: "H(0-29) 20 * * * %MBED_TLS_BRANCH=development \nH(0-29) 20 * * * %MBED_TLS_BRANCH=mbedtls-2.28"
+        cron: "H(0-29) 0 * * * %MBED_TLS_BRANCH=development \nH(0-29) 2 * * * %MBED_TLS_BRANCH=mbedtls-2.28"