Update Surrogates URL (#1747)

Task/Issue URL:
https://app.asana.com/0/1201037661562251/1205688161731059/f
Tech Design URL:
CC:

**Description**:
Update surrogates URL

Author: Bunn

DuckDuckGo/AppDelegate/AppConfigurationURLProvider.swift

@@ -27,7 +27,7 @@ struct AppConfigurationURLProvider: ConfigurationURLProviding {
         case .bloomFilterSpec: return URL(string: "https://staticcdn.duckduckgo.com/https/https-mobile-v2-bloom-spec.json")!
         case .bloomFilterExcludedDomains: return URL(string: "https://staticcdn.duckduckgo.com/https/https-mobile-v2-false-positives.json")!
         case .privacyConfiguration: return URL(string: "https://staticcdn.duckduckgo.com/trackerblocking/config/v3/macos-config.json")!
-        case .surrogates: return URL(string: "https://duckduckgo.com/contentblocking.js?l=surrogates")!
+        case .surrogates: return URL(string: "https://staticcdn.duckduckgo.com/surrogates.txt")!
         case .trackerDataSet: return URL(string: "https://staticcdn.duckduckgo.com/trackerblocking/v5/current/macos-tds.json")!
         // In archived repo, to be refactored shortly (https://staticcdn.duckduckgo.com/useragents/social_ctp_configuration.json)
         case .FBConfig: return URL(string: "https://staticcdn.duckduckgo.com/useragents/")!

UnitTests/AppDelegate/AppConfigurationURLProviderTests.swift

@@ -26,7 +26,7 @@ final class AppConfigurationURLProviderTests: XCTestCase {
         XCTAssertEqual(AppConfigurationURLProvider().url(for: .bloomFilterSpec).absoluteString, "https://staticcdn.duckduckgo.com/https/https-mobile-v2-bloom-spec.json")
         XCTAssertEqual(AppConfigurationURLProvider().url(for: .bloomFilterExcludedDomains).absoluteString, "https://staticcdn.duckduckgo.com/https/https-mobile-v2-false-positives.json")
         XCTAssertEqual(AppConfigurationURLProvider().url(for: .privacyConfiguration).absoluteString, "https://staticcdn.duckduckgo.com/trackerblocking/config/v3/macos-config.json")
-        XCTAssertEqual(AppConfigurationURLProvider().url(for: .surrogates).absoluteString, "https://duckduckgo.com/contentblocking.js?l=surrogates")
+        XCTAssertEqual(AppConfigurationURLProvider().url(for: .surrogates).absoluteString, "https://staticcdn.duckduckgo.com/surrogates.txt")
         XCTAssertEqual(AppConfigurationURLProvider().url(for: .trackerDataSet).absoluteString, "https://staticcdn.duckduckgo.com/trackerblocking/v5/current/macos-tds.json")
         XCTAssertEqual(AppConfigurationURLProvider().url(for: .FBConfig).absoluteString, "https://staticcdn.duckduckgo.com/useragents/")
     }