Resets to a last known working pipenv version

.github/workflows/ci.yml

@@ -43,7 +43,9 @@ jobs:
         uses: actions/checkout@v3
       -
         name: Install pipenv
-        run: pipx install pipenv
+        run: |
+          pipx install pipenv==2022.8.5
+          pipenv --version
       -
         name: Set up Python
         uses: actions/setup-python@v4
@@ -55,6 +57,10 @@ jobs:
         name: Install dependencies
         run: |
           pipenv sync --dev
+      -
+        name: List installed Python dependencies
+        run: |
+          pipenv run pip list
       -
         name: Make documentation
         run: |
@@ -84,7 +90,9 @@ jobs:
           fetch-depth: 2
       -
         name: Install pipenv
-        run: pipx install pipenv
+        run: |
+          pipx install pipenv==2022.8.5
+          pipenv --version
       -
         name: Set up Python
         uses: actions/setup-python@v4
@@ -101,6 +109,10 @@ jobs:
         name: Install Python dependencies
         run: |
           pipenv sync --dev
+      -
+        name: List installed Python dependencies
+        run: |
+          pipenv run pip list
       -
         name: Tests
         run: |