Rename diphda to corstone1000

Diphda platform in TF-M is renamed to corstone1000.
Open CI needs to align with this change.

Signed-off-by: Xinyu Zhang <xinyu.zhang@arm.com>
Change-Id: Id967f3c478ae498654941a25695827388bb3bcfe
diff --git a/tf-m-build-and-test.yaml b/tf-m-build-and-test.yaml
index 22d3aac..c2d63ac 100644
--- a/tf-m-build-and-test.yaml
+++ b/tf-m-build-and-test.yaml
@@ -27,7 +27,7 @@
       - string:
           name: 'FILTER_GROUP'
           # TODO once available, use a group that filters to configurations we want
-          default: 'pp_test pp_OTP pp_psoc64 diphda'
+          default: 'pp_test pp_OTP pp_psoc64 corstone1000'
           description: |
             Filter to a group of configurations as recognised by configs.py
       - string: