chore(deps-dev): bump sanitize-html from 1.20.1 to 1.21.1 (#3959)

Bumps [sanitize-html](https://github.com/punkave/sanitize-html) from 1.20.1 to 1.21.1.
- [Release notes](https://github.com/punkave/sanitize-html/releases)
- [Changelog](https://github.com/apostrophecms/sanitize-html/blob/master/CHANGELOG.md)
- [Commits](https://github.com/punkave/sanitize-html/commits/1.21.1)

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

package.json

@@ -119,7 +119,7 @@
     "paypal-checkout": "^4.0.311",
     "query-string": "^6.10.1",
     "qunit-dom": "^0.9.2",
-    "sanitize-html": "^1.20.1",
+    "sanitize-html": "^1.21.1",
     "sass": "^1.25.0",
     "semantic-ui-ember": "3.0.3",
     "string_decoder": "^1.3.0",

yarn.lock

@@ -14268,9 +14268,10 @@ sane@^4.1.0:
     minimist "^1.1.1"
     walker "~1.0.5"
 
-sanitize-html@^1.20.1:
-  version "1.20.1"
-  resolved "https://registry.yarnpkg.com/sanitize-html/-/sanitize-html-1.20.1.tgz#f6effdf55dd398807171215a62bfc21811bacf85"
+sanitize-html@^1.21.1:
+  version "1.21.1"
+  resolved "https://registry.yarnpkg.com/sanitize-html/-/sanitize-html-1.21.1.tgz#1647d15c0c672901aa41eac1b86d0c38146d30ce"
+  integrity sha512-W6enXSVphVaVbmVbzVngBthR5f5sMmhq3EfPfBlzBzp2WnX8Rnk7NGpP7KmHUc0Y3MVk9tv/+CbpdHchX9ai7g==
   dependencies:
     chalk "^2.4.1"
     htmlparser2 "^3.10.0"