i#5365 Update new self-hosted runner for Arm pre-sve workflow (#6910)

diff --git a/.github/workflows/ci-aarchxx.yml b/.github/workflows/ci-aarchxx.yml
index 99f1862..831e4cd 100644
--- a/.github/workflows/ci-aarchxx.yml
+++ b/.github/workflows/ci-aarchxx.yml
@@ -51,7 +51,7 @@
       matrix:
         # This job will run in parallel.
         include:
-          - os: ubuntu-20-arm64
+          - os: ubuntu-20-arm64-pre-sve
             sve: false
           - os: ubuntu-20-arm64-sve
             sve: true