Add ST Configs to Nightly Job

ST related configs need to be covered in nightly job.
Add ST config group to the default nightly group list.

Signed-off-by: Xinyu Zhang <xinyu.zhang@arm.com>
Change-Id: Ie26918b1f8792212a4126239f0b967ab417245af
diff --git a/tf-m-nightly.yaml b/tf-m-nightly.yaml
index 7161e14..ec9223f 100644
--- a/tf-m-nightly.yaml
+++ b/tf-m-nightly.yaml
@@ -23,7 +23,7 @@
     parameters:
       - string:
           name: 'FILTER_GROUP'
-          default: 'nightly_test nightly_profile nightly_psa_api nightly_ff nightly_otp'
+          default: 'nightly_test nightly_profile nightly_psa_api nightly_ff nightly_otp nightly_stm32l562e_dk'
           description: |
             Filter to a group of configurations as recognised by configs.py
       - string: