Bump terser from 4.6.7 to 4.6.9 (#30483)

Bumps [terser](https://github.com/terser/terser) from 4.6.7 to 4.6.9.
- [Release notes](https://github.com/terser/terser/releases)
- [Changelog](https://github.com/terser/terser/blob/master/CHANGELOG.md)
- [Commits](https://github.com/terser/terser/compare/v4.6.7...v4.6.9)

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

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>
Co-authored-by: XhmikosR <xhmikosr@gmail.com>

package.json

@@ -132,7 +132,7 @@
     "shelljs": "^0.8.3",
     "stylelint": "^13.2.1",
     "stylelint-config-twbs-bootstrap": "^2.0.1",
-    "terser": "^4.6.7",
+    "terser": "^4.6.9",
     "vnu-jar": "20.3.16"
   },
   "files": [