Switch doc generation away from poetry

Signed-off-by: Travis F. Collins <[email protected]>

.github/workflows/doc.yml

@@ -8,8 +8,8 @@ jobs:
         python-version: ['3.8']
     name: Python ${{ matrix.python-version }}
     steps:
-    - uses: actions/checkout@v2
-    - uses: actions/setup-python@v1
+    - uses: actions/checkout@v4
+    - uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python-version }}
         architecture: x64
@@ -26,11 +26,11 @@ jobs:
       POETRY_GIT_COMMITTER_EMAIL: "${{ secrets.GIT_EMAIl }}"
     if: github.ref == 'refs/heads/main'
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 0
       - name: Set up Python 3.8
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v5
         with:
           python-version: 3.8
 
@@ -48,9 +48,9 @@ jobs:
     needs: [build]
     if: github.event_name == 'push' && startsWith(github.ref, 'refs/tags')
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Set up Python 3.8
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v5
         with:
           python-version: 3.8