fix: install pytest_regressions in release pipeline (#655)

Author: kikomiss

.ado/publish.yml

@@ -108,7 +108,7 @@ extends:
           displayName: Set Python version
 
         - script: |
-            pip install pytest pytest-azurepipelines pytest-cov
+            pip install pytest pytest-azurepipelines pytest-cov pytest-regressions
           displayName: Install pytest dependencies
 
         - script: |