Attempt to get Netlify builds to pass - use sudo

Author: stevepiercy

Makefile

@@ -206,7 +206,7 @@ livehtml: deps  ## Rebuild Sphinx documentation on changes, with live-reload in
 
 .PHONY: netlifyreqs
 netlifyreqs:
-	apt install python3.8-venv
+	sudo apt install python3.8-venv
 
 .PHONY: netlify
 netlify: netlifyreqs html