Update uber-templates-mca.asciidoc

Fixed UriTemplate for search Url. http://example.org/search?{givenname, familyname} would resolve to 'http://example.org/search?Mark, Foster' if I apply 3.2.2 String expansion with multiple variables
Merge pull request #37 from dschulten/patch-3

Update uber-templates-mca.asciidoc