Build(deps): Bump @glimmer/syntax from 0.91.0 to 0.91.1 (#26428)

Bumps [@glimmer/syntax](https://github.com/glimmerjs/glimmer-vm) from 0.91.0 to 0.91.1.
- [Release notes](https://github.com/glimmerjs/glimmer-vm/releases)
- [Changelog](https://github.com/glimmerjs/glimmer-vm/blob/main/CHANGELOG.md)
- [Commits](https://github.com/glimmerjs/glimmer-vm/compare/v0.91.0...v0.91.1)

---
updated-dependencies:
- dependency-name: "@glimmer/syntax"
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

app/assets/javascripts/discourse-widget-hbs/package.json

@@ -24,7 +24,7 @@
     "@ember/optional-features": "^2.1.0",
     "@embroider/test-setup": "^3.0.3",
     "@glimmer/component": "^1.1.2",
-    "@glimmer/syntax": "^0.91.0",
+    "@glimmer/syntax": "^0.91.1",
     "broccoli-asset-rev": "^3.0.0",
     "ember-cli": "~5.7.0",
     "ember-cli-inject-live-reload": "^2.1.0",

app/assets/javascripts/discourse/package.json

@@ -16,7 +16,7 @@
     "postinstall": "../run-patch-package"
   },
   "dependencies": {
-    "@glimmer/syntax": "^0.91.0",
+    "@glimmer/syntax": "^0.91.1",
     "@highlightjs/cdn-assets": "^11.9.0",
     "discourse-hbr": "1.0.0",
     "discourse-widget-hbs": "1.0.0",