Update installation.rst with missing ocpsvg deps

docs/installation.rst

@@ -108,7 +108,8 @@ A procedure for avoiding this issue is to install in a conda environment, which
 	conda install -c cadquery -c conda-forge cadquery=master
 	pip install svgwrite svgpathtools anytree scipy ipython \
 	    ocp_tessellate webcolors==1.12 numpy numpy-quaternion cachetools==5.2.0 \
-	    ocp_vscode requests orjson urllib3 certifi numpy-stl git+https://github.com/jdegenstein/py-lib3mf
+	    ocp_vscode requests orjson urllib3 certifi numpy-stl git+https://github.com/jdegenstein/py-lib3mf \
+	    "svgpathtools>=1.5.1,<2" "svgelements>=1.9.1,<2"
 	pip install --no-deps git+https://github.com/gumyr/build123d git+https://github.com/snoyer/ocpsvg
 
 `You can track the issue here <https://github.com/CadQuery/ocp-build-system/issues/11#issuecomment-1407769681>`_