test(bundler): update expected output for multi_json homepage move

The multi_json gem has been transferred from **intridea** to **sferik** and
its README now declares
https://github.com/sferik/multi_json as the canonical project URL.

Update the Bundler functional-test expectation
(`bundler-expected-output-gemspec.yml`) to reflect the new `homepage_url`
value so the test remains green.

Signed-off-by: Jonatan Männchen <jonatan@maennchen.ch>

Author: maennchen

plugins/package-managers/bundler/src/funTest/assets/projects/synthetic/bundler-expected-output-gemspec.yml

@@ -198,7 +198,7 @@ packages:
   description: "A common interface to multiple JSON libraries, including Oj, Yajl,\
     \ the JSON gem (with C-extensions), the pure-Ruby JSON gem, NSJSONSerialization,\
     \ gson.rb, JrJackson, and OkJson."
-  homepage_url: "https://github.com/intridea/multi_json"
+  homepage_url: "https://github.com/sferik/multi_json"
   binary_artifact:
     url: ""
     hash: