fix poetry constraints file for coverage run

Author: tasansal

.github/workflows/tests.yml

@@ -127,7 +127,7 @@ jobs:
 
       - name: Install Poetry
         run: |
-          pipx install --pip-args=--constraint=.github/workflows/constraints.txt poetry
+          pipx install --pip-args=--constraint=.github/workflows/constraints-poetry.txt poetry
           poetry --version
 
       - name: Install Nox