[TASK] Update flag-icons

Executed commands:

    npm install --save-dev flag-icons@^7.2.1
    npm run build

Resolves: #103656
Releases: main, 12.4
Change-Id: Ibebf001a8867104d616777adf47b7c0edaccbf9d
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/83876
Tested-by: Jasmina Ließmann <minapokhalo+typo3@gmail.com>
Reviewed-by: Oliver Bartsch <bo@cedev.de>
Tested-by: core-ci <typo3@b13.com>
Reviewed-by: Jasmina Ließmann <minapokhalo+typo3@gmail.com>
Tested-by: Andreas Kienast <a.fernandez@scripting-base.de>
Tested-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Andreas Kienast <a.fernandez@scripting-base.de>

Build/package.json

@@ -38,7 +38,7 @@
     "eslint-plugin-lit": "^1.11.0",
     "eslint-plugin-wc": "^2.0.4",
     "filesize": "^10.1.0",
-    "flag-icons": "^7.1.0",
+    "flag-icons": "^7.2.1",
     "grunt": "^1.6.1",
     "grunt-concurrent": "^3.0.0",
     "grunt-contrib-clean": "^2.0.1",