Fix missing pdm installs in release workflow

Signed-off-by: Samuel Monson <[email protected]>

Author: sjmonson

.github/workflows/release.yml

@@ -120,7 +120,9 @@ jobs:
         with:
           python-version: ${{ matrix.python }}
       - name: Install dependencies
-        run: pip install tox tox-pdm
+        run: |
+          curl -sSL https://pdm-project.org/install-pdm.py | python3 -
+          pip install tox tox-pdm
       - name: Run integration tests
         run: tox -e test-integration
 
@@ -155,7 +157,9 @@ jobs:
         with:
           python-version: ${{ matrix.python }}
       - name: Install dependencies
-        run: pip install tox tox-pdm
+        run: |
+          curl -sSL https://pdm-project.org/install-pdm.py | python3 -
+          pip install tox tox-pdm
       - name: Run end-to-end tests
         run: tox -e test-e2e