Build(deps): Bump terser in /app/assets/javascripts (#23765)

Bumps [terser](https://github.com/terser/terser) from 5.20.0 to 5.21.0.
- [Changelog](https://github.com/terser/terser/blob/master/CHANGELOG.md)
- [Commits](https://github.com/terser/terser/compare/v5.20.0...v5.21.0)

---
updated-dependencies:
- dependency-name: terser
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

app/assets/javascripts/discourse/package.json

@@ -103,7 +103,7 @@
     "select-kit": "1.0.0",
     "sinon": "^16.0.0",
     "source-map": "^0.7.4",
-    "terser": "^5.20.0",
+    "terser": "^5.21.0",
     "truth-helpers": "1.0.0",
     "util": "^0.12.5",
     "virtual-dom": "^2.1.1",

app/assets/javascripts/theme-transpiler/package.json

@@ -19,7 +19,7 @@
     "handlebars": "^4.7.8",
     "path-browserify": "^1.0.1",
     "polyfill-crypto.getrandomvalues": "^1.0.0",
-    "terser": "^5.20.0"
+    "terser": "^5.21.0"
   },
   "engines": {
     "node": "16.* || >= 18",

app/assets/javascripts/yarn.lock

@@ -10279,10 +10279,10 @@ terser-webpack-plugin@^5.3.7:
     serialize-javascript "^6.0.1"
     terser "^5.16.8"
 
-terser@^5.16.8, terser@^5.20.0, terser@^5.3.0, terser@^5.7.0:
-  version "5.20.0"
-  resolved "https://registry.yarnpkg.com/terser/-/terser-5.20.0.tgz#ea42aea62578703e33def47d5c5b93c49772423e"
-  integrity sha512-e56ETryaQDyebBwJIWYB2TT6f2EZ0fL0sW/JRXNMN26zZdKi2u/E/5my5lG6jNxym6qsrVXfFRmOdV42zlAgLQ==
+terser@^5.16.8, terser@^5.21.0, terser@^5.3.0, terser@^5.7.0:
+  version "5.21.0"
+  resolved "https://registry.yarnpkg.com/terser/-/terser-5.21.0.tgz#d2b27e92b5e56650bc83b6defa00a110f0b124b2"
+  integrity sha512-WtnFKrxu9kaoXuiZFSGrcAvvBqAdmKx0SFNmVNYdJamMu9yyN3I/QF0FbH4QcqJQ+y1CJnzxGIKH0cSj+FGYRw==
   dependencies:
     "@jridgewell/source-map" "^0.3.3"
     acorn "^8.8.2"