Build(deps): Bump @glimmer/syntax in /app/assets/javascripts (#20797)

Bumps [@glimmer/syntax](https://github.com/glimmerjs/glimmer-vm) from 0.84.2 to 0.84.3.
- [Release notes](https://github.com/glimmerjs/glimmer-vm/releases)
- [Changelog](https://github.com/glimmerjs/glimmer-vm/blob/master/CHANGELOG.md)
- [Commits](https://github.com/glimmerjs/glimmer-vm/compare/v0.84.2...v0.84.3)

---
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

@@ -26,7 +26,7 @@
     "@ember/optional-features": "^2.0.0",
     "@embroider/test-setup": "^2.1.1",
     "@glimmer/component": "^1.1.2",
-    "@glimmer/syntax": "^0.84.2",
+    "@glimmer/syntax": "^0.84.3",
     "broccoli-asset-rev": "^3.0.0",
     "ember-cli": "~3.28.5",
     "ember-cli-dependency-checker": "^3.3.1",

app/assets/javascripts/discourse/package.json

@@ -28,7 +28,7 @@
     "@ember/render-modifiers": "^2.0.5",
     "@ember/test-helpers": "^2.9.3",
     "@glimmer/component": "^1.1.2",
-    "@glimmer/syntax": "^0.84.2",
+    "@glimmer/syntax": "^0.84.3",
     "@glimmer/tracking": "^1.1.2",
     "@popperjs/core": "^2.11.6",
     "@uppy/aws-s3": "^3.0.4",

app/assets/javascripts/yarn.lock

@@ -1259,20 +1259,20 @@
   resolved "https://registry.yarnpkg.com/@glimmer/env/-/env-0.1.7.tgz#fd2d2b55a9029c6b37a6c935e8c8871ae70dfa07"
   integrity sha1-/S0rVakCnGs3psk16MiHGucN+gc=
 
-"@glimmer/interfaces@0.84.2":
-  version "0.84.2"
-  resolved "https://registry.yarnpkg.com/@glimmer/interfaces/-/interfaces-0.84.2.tgz#764cf92c954adcd1a851e5dc68ec1f6b654dc3bd"
-  integrity sha512-tMZxQpOddUVmHEOuripkNqVR7ba0K4doiYnFd4WyswqoHPlxqpBujbIamQ+bWCWEF0U4yxsXKa31ekS/JHkiBQ==
+"@glimmer/interfaces@0.84.3":
+  version "0.84.3"
+  resolved "https://registry.yarnpkg.com/@glimmer/interfaces/-/interfaces-0.84.3.tgz#629777a4abe373b0785656f6c8d08989f5784805"
+  integrity sha512-dk32ykoNojt0mvEaIW6Vli5MGTbQo58uy3Epj7ahCgTHmWOKuw/0G83f2UmFprRwFx689YTXG38I/vbpltEjzg==
   dependencies:
     "@simple-dom/interface" "^1.4.0"
 
-"@glimmer/syntax@^0.84.2":
-  version "0.84.2"
-  resolved "https://registry.yarnpkg.com/@glimmer/syntax/-/syntax-0.84.2.tgz#a3f65e51eec20f6adb79c6159d1ad1166fa5bccd"
-  integrity sha512-SPBd1tpIR9XeaXsXsMRCnKz63eLnIZ0d5G9QC4zIBFBC3pQdtG0F5kWeuRVCdfTIFuR+5WBMfk5jvg+3gbQhjg==
+"@glimmer/syntax@^0.84.3":
+  version "0.84.3"
+  resolved "https://registry.yarnpkg.com/@glimmer/syntax/-/syntax-0.84.3.tgz#4045a1708cef7fd810cff42fe6deeba40c7286d0"
+  integrity sha512-ioVbTic6ZisLxqTgRBL2PCjYZTFIwobifCustrozRU2xGDiYvVIL0vt25h2c1ioDsX59UgVlDkIK4YTAQQSd2A==
   dependencies:
-    "@glimmer/interfaces" "0.84.2"
-    "@glimmer/util" "0.84.2"
+    "@glimmer/interfaces" "0.84.3"
+    "@glimmer/util" "0.84.3"
     "@handlebars/parser" "~2.0.0"
     simple-html-tokenizer "^0.5.11"
 
@@ -1284,13 +1284,13 @@
     "@glimmer/env" "^0.1.7"
     "@glimmer/validator" "^0.44.0"
 
-"@glimmer/util@0.84.2":
-  version "0.84.2"
-  resolved "https://registry.yarnpkg.com/@glimmer/util/-/util-0.84.2.tgz#2711ba40f25f44b2ea309cad49f5c2622c6211bc"
-  integrity sha512-VbhzE2s4rmU+qJF3gGBTL1IDjq+/G2Th51XErS8MQVMCmE4CU2pdwSzec8PyOowqCGUOrVIWuMzEI6VoPM4L4w==
+"@glimmer/util@0.84.3":
+  version "0.84.3"
+  resolved "https://registry.yarnpkg.com/@glimmer/util/-/util-0.84.3.tgz#9ae0166982c0b48aa94b02d6ba8c2c81976ade4b"
+  integrity sha512-qFkh6s16ZSRuu2rfz3T4Wp0fylFj3HBsONGXQcrAdZjdUaIS6v3pNj6mecJ71qRgcym9Hbaq/7/fefIwECUiKw==
   dependencies:
     "@glimmer/env" "0.1.7"
-    "@glimmer/interfaces" "0.84.2"
+    "@glimmer/interfaces" "0.84.3"
     "@simple-dom/interface" "^1.4.0"
 
 "@glimmer/util@^0.44.0":