Check for icu: strings in js folder as well

Co-authored-by: Fedor Indutny <79877362+indutny-signal@users.noreply.github.com>

_locales/en/messages.json

@@ -877,7 +877,7 @@
   },
   "icu:callingDeveloperToolsDescription": {
     "messageformat": "This window is used during development to display diagnostics from ongoing calls.",
-    "description": "(Deleted 2024/07/02) Description displayed for calling developer tools window"
+    "description": "Description displayed for calling developer tools window"
   },
   "icu:speech": {
     "messageformat": "Speech",

ts/scripts/mark-unused-strings-deleted.ts

@@ -22,6 +22,7 @@ function getIcuLikeStrings(): Set<string> {
       '--recursive',
       'ts/',
       'app/',
+      'js/',
     ],
     {
       cwd: rootDir,