refactor: add right path for dev deploy status list mock workflow

Author: nstefanopoulou-gds

.github/workflows/status-list-mock-dev-deploy.yml

@@ -17,6 +17,9 @@ jobs:
     permissions:
       id-token: write
       contents: read
+    defaults:
+      run:
+        working-directory: ./sts-mock
     steps:
       - name: Check out repository code
         uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2