Sphinxsetup: add quotes around Sphinx requirement commandline item

Author: peterbarker

Sphinxsetup.sh

@@ -51,7 +51,7 @@ rm -f get-pip.py
 
 # Install python packages using known working versions
 # Install sphinx with a specific docutils version
-python3 -m pip install --user --upgrade sphinx==${SPHINX_VERSION} "docutils<0.19"  requests>=2.31.0
+python3 -m pip install --user --upgrade sphinx==${SPHINX_VERSION} "docutils<0.19"  "requests>=2.31.0"
 
 # lxml for parameter parsing:
 python3 -m pip install --user --upgrade lxml