explicit package version for doc building

Author: jchanvfx

.github/workflows/sphinx_doc_build.yml

@@ -31,11 +31,11 @@ jobs:
       # Install the python dependencies required for building.
       - name: Install Dependencies
         run: |
-            pip install sphinx
+            pip install sphinx==7.1.2
             pip install bs4
             pip install PySide2
             pip install Qt.py
-            pip install autodocsumm
+            pip install autodocsumm==0.2.11
       # Set the local git configs.
       - name: Set Git Config
         run: |