Bump js-yaml from 5.2.3 to 5.4.0

Bumps [js-yaml](https://github.com/nodeca/js-yaml) from 5.2.3 to 5.4.0.
- [Changelog](https://github.com/nodeca/js-yaml/blob/master/CHANGELOG.md)
- [Commits](https://github.com/nodeca/js-yaml/compare/5.2.3...5.4.0)

---
updated-dependencies:
- dependency-name: js-yaml
  dependency-version: 5.4.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

ci/build/npm-postinstall.sh

@@ -18,7 +18,7 @@ symlink() {
   dest="$2"
   rm -rf "$dest"
   case $OS in
-    windows) cmd //c mklink //J "$dest" "$source" ;;
+    windows) mklink /J "$dest" "$source" ;;
     *) ln -s "$source" "$dest" ;;
   esac
 }
@@ -67,7 +67,7 @@ main() {
 
   if [ "$major_node_version" -ne "${FORCE_NODE_VERSION:-24}" ]; then
     echo "ERROR: code-server currently requires node v24."
-    if [ -n "${FORCE_NODE_VERSION:-}" ]; then
+    if [ -n "$FORCE_NODE_VERSION" ]; then
       echo "However, you have overrided the version check to use v$FORCE_NODE_VERSION."
     fi
     echo "We have detected that you are on node v$major_node_version"

package-lock.json

@@ -4176,9 +4176,9 @@
       "license": "ISC"
     },
     "node_modules/js-yaml": {
-      "version": "5.2.3",
+      "version": "5.4.0",
-      "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-5.2.3.tgz",
+      "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-5.4.0.tgz",
-      "integrity": "sha512-n+mUVyUX5bVv7G/G2zyIHOhdxfuU1dY2NOFzTQUWiMUbFss8b57NFlgCCaggU78wSw5KVS9cllzeLyzyR+n5nw==",
+      "integrity": "sha512-jE7vUJIebKzYQI5xu4co5CRBDlDEYnHrdzsxs4O2giCz4v2SbVMYKpmt1D9L38OKQAeCWmrOTRiCV93u0UkaJA==",
       "funding": [
         {
           "type": "github",