Update C-S-S to 7.1.0 (#1149)

Task/Issue URL: https://app.asana.com/0/0/1209096872344395/f

Description:
This change updates C-S-S to the version containing latest fixes to HTML New Tab Page.
The production code isn't affected. This is a major bump of the C-S-S but it's transparent
to native apps (extension-specific change).

Package.resolved

@@ -14,8 +14,8 @@
       "kind" : "remoteSourceControl",
       "location" : "https://github.com/duckduckgo/content-scope-scripts",
       "state" : {
-        "revision" : "bc808eb735d9eb72d5c54cf2452b104b6a370e25",
-        "version" : "6.43.0"
+        "revision" : "a539758027d9fd37d9d26213399ac156ca9fb81c",
+        "version" : "7.1.0"
       }
     },
     {

Package.swift

@@ -55,7 +55,7 @@ let package = Package(
         .package(url: "https://github.com/duckduckgo/TrackerRadarKit", exact: "3.0.0"),
         .package(url: "https://github.com/duckduckgo/sync_crypto", exact: "0.3.0"),
         .package(url: "https://github.com/gumob/PunycodeSwift.git", exact: "3.0.0"),
-        .package(url: "https://github.com/duckduckgo/content-scope-scripts", exact: "6.43.0"),
+        .package(url: "https://github.com/duckduckgo/content-scope-scripts", exact: "7.1.0"),
         .package(url: "https://github.com/duckduckgo/privacy-dashboard", exact: "7.5.0"),
         .package(url: "https://github.com/httpswift/swifter.git", exact: "1.5.0"),
         .package(url: "https://github.com/duckduckgo/bloom_cpp.git", exact: "3.0.0"),