Examples in the docs for configuration options are out of date

[SeanBryan51]

The path key was deprecated in #208. This should be updated to use the latest schema.

benchcab/docs/user_guide/config_options.md

Lines 393 to 400 in 8a1e1a8

	```yaml
	realisations:
	# head of the trunk
	- path: trunk
	# some development branch
	- path: branches/Users/foo/my_branch
	build_script: offline/build.sh
	```

benchcab/docs/user_guide/config_options.md

Lines 407 to 417 in 8a1e1a8

	```yaml
	realisations:
	# head of the trunk
	- path: trunk
	# some development branch
	- path: branches/Users/foo/my_branch
	patch: # (1)
	cable:
	cable_user:
	FWSOIL_SWITCH: "Lai and Ktaul 2000"
	```

benchcab/docs/user_guide/config_options.md

Lines 426 to 435 in 8a1e1a8

	```yaml
	realisations:
	# head of the trunk
	- path: trunk
	# some development branch
	- path: branches/Users/foo/my_branch
	patch_remove:
	cable:
	soilparmnew: nil # (1)
	```