Fix CI common-setup action

Author: cjdsellers

.github/actions/common-setup/action.yml

@@ -151,9 +151,15 @@ runs:
     - name: Install build and dev dependencies
       shell: bash
       run: |
-        python -m pip install --upgrade pip setuptools tomllib wheel
+        python -m pip install --upgrade pip setuptools wheel
         poetry install --only dev --no-root
 
+    - name: Install tomllib (if Python < 3.11)
+      shell: bash
+      run: |
+        python -c "import sys; sys.exit(0) if sys.version_info >= (3, 11) else sys.exit(1)" || \
+          python -m pip install tomllib
+
     # > --------------------------------------------------
     # > pre-commit
     - name: Cached pre-commit