Update reference tests to version 1721137609 (#4769)

Task/Issue URL:
https://app.asana.com/0/488551667048375/1207828713976554/f

 ----- 
- Automated reference tests dependency update

This PR updates the reference tests dependency to the latest available
version and copies the necessary files.
If tests have failed, see https://app.asana.com/0/0/1203766026095653/f
for further information on what to do next.

- [x] All tests must pass

Co-authored-by: daxmobile <daxmobile@users.noreply.github.com>

app/src/test/resources/reference_tests/brokensites/tests.json

@@ -486,7 +486,7 @@
                     {"name": "openerContext", "value": "serp"},
                     {"name": "userRefreshCount", "value": "3"},
                     {"name": "jsPerformance", "value": "123.45"},
-                    {"name": "locale", "value": "en"}
+                    {"name": "locale", "value": "en-US"}
                 ],
                 "exceptPlatforms": [
                     "ios-browser",

package.json

@@ -17,6 +17,6 @@
     "@duckduckgo/autofill": "github:duckduckgo/duckduckgo-autofill#12.0.1",
     "@duckduckgo/content-scope-scripts": "github:duckduckgo/content-scope-scripts#6.3.0",
     "@duckduckgo/privacy-dashboard": "github:duckduckgo/privacy-dashboard#3.5.0",
-    "@duckduckgo/privacy-reference-tests": "github:duckduckgo/privacy-reference-tests#1720621685"
+    "@duckduckgo/privacy-reference-tests": "github:duckduckgo/privacy-reference-tests#1721137609"
   }
 }