chore(deps-dev): bump grunt from 1.5.2 to 1.5.3 in /website

Bumps [grunt](https://github.com/gruntjs/grunt) from 1.5.2 to 1.5.3.
- [Release notes](https://github.com/gruntjs/grunt/releases)
- [Changelog](https://github.com/gruntjs/grunt/blob/main/CHANGELOG)
- [Commits](https://github.com/gruntjs/grunt/compare/v1.5.2...v1.5.3)

---
updated-dependencies:
- dependency-name: grunt
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>

website/package.json

@@ -30,7 +30,7 @@
     "autoprefixer": "10.3.4",
     "coffeelint": "2.1.0",
     "coffeescript": "2.5.1",
-    "grunt": "1.5.2",
+    "grunt": "1.5.3",
     "grunt-assets-inline": "1.2.4",
     "grunt-bump": "0.8.0",
     "grunt-cache-bust": "1.7.0",

website/yarn.lock

@@ -1727,10 +1727,10 @@ grunt-xmlmin@0.1.8:
     maxmin "~1.1.0"
     pretty-data "~0.40.0"
 
-grunt@1.5.2, grunt@^1.1.0:
-  version "1.5.2"
-  resolved "https://registry.yarnpkg.com/grunt/-/grunt-1.5.2.tgz#46b014e28d17c85baac19d5e891bb3f04923c098"
-  integrity sha512-XCtfaIu72OyDqK24MjWiGC9SwlkuhkS1mrULr1xzuJ2XqAFhP3ZAchZGHJeSCY6mkaOXU4F7SbmmCF7xIVoC9w==
+grunt@1.5.3, grunt@^1.1.0:
+  version "1.5.3"
+  resolved "https://registry.yarnpkg.com/grunt/-/grunt-1.5.3.tgz#3214101d11257b7e83cf2b38ea173b824deab76a"
+  integrity sha512-mKwmo4X2d8/4c/BmcOETHek675uOqw0RuA/zy12jaspWqvTp4+ZeQF1W+OTpcbncnaBsfbQJ6l0l4j+Sn/GmaQ==
   dependencies:
     dateformat "~3.0.3"
     eventemitter2 "~0.4.13"