cleanup: Use type-safe comparisons

We have been using type-safe comparisons in new code for quite a while
now, however old code has only been adapted slowly.

Change all the remaining bits to get rid of another legacy style
difference.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/2866>

js/ui/scripting.js

@@ -232,7 +232,7 @@ function _collect(scriptModule, outputFile) {
         Shell.write_string_to_stream(out, ',\n"monitors":\n[');
         for (let i = 0; i < monitors.length; i++) {
             let monitor = monitors[i];
-            if (i != 0)
+            if (i !== 0)
                 Shell.write_string_to_stream(out, ', ');
             const prefix = i === primary ? '*' : '';
             Shell.write_string_to_stream(out,