SOLIDPOD: update example for multi file sharing

[jesscmoore]

Description

Branch jess/271_multi_share in solidui implements breaking change with resourceName changed to resourceNames and supplied as a list. Update solidpod's example.

Why

So that as a user I can still use the sharing demos in demopod.

Closing Criteria

Checklist for closing the issue:

• No errors from make prep
• All tests pass make qtest
• demopod sharing works with solidui jess/271_multi_share