fix: use handlebars as code fence lang (#241)

---

Commit:  ember-learn/super-rentals-tutorial@e040bb1
Script:  https://github.com/ember-learn/super-rentals-tutorial/blob/e040bb15b729ba7c0fbf457b3ff7fadc799e8272/.github/workflows/build.yml
Logs:    https://github.com/ember-learn/super-rentals-tutorial/commit/e040bb15b729ba7c0fbf457b3ff7fadc799e8272/checks

yarn.lock

@@ -1301,7 +1301,7 @@
   dependencies:
     eslint-visitor-keys "^3.3.0"
 
-"@eslint-community/regexpp@^4.6.0", "@eslint-community/regexpp@^4.6.1":
+"@eslint-community/regexpp@^4.11.0", "@eslint-community/regexpp@^4.6.1":
   version "4.11.0"
   resolved "https://registry.yarnpkg.com/@eslint-community/regexpp/-/regexpp-4.11.0.tgz#b0ffd0312b4a3fd2d6f77237e7248a5ad3a680ae"
   integrity sha512-G/M/tIiMrTAxEWRfLfQJMmGNX28IxBg4PBz8XqQhqUHLFI6TL2htpIB1iQCj144V5ee/JaKyT9/WZ0MGZWfA7A==
@@ -5004,12 +5004,12 @@ eslint-plugin-ember@^11.12.0:
     snake-case "^3.0.3"
 
 eslint-plugin-es-x@^7.5.0:
-  version "7.7.0"
-  resolved "https://registry.yarnpkg.com/eslint-plugin-es-x/-/eslint-plugin-es-x-7.7.0.tgz#26a2e96ac9d5b510dec4635c7e30ec5b7b142a3f"
-  integrity sha512-aP3qj8BwiEDPttxQkZdI221DLKq9sI/qHolE2YSQL1/9+xk7dTV+tB1Fz8/IaCA+lnLA1bDEnvaS2LKs0k2Uig==
+  version "7.8.0"
+  resolved "https://registry.yarnpkg.com/eslint-plugin-es-x/-/eslint-plugin-es-x-7.8.0.tgz#a207aa08da37a7923f2a9599e6d3eb73f3f92b74"
+  integrity sha512-7Ds8+wAAoV3T+LAKeu39Y5BzXCrGKrcISfgKEqTS4BDN8SFEDQd0S43jiQ8vIa3wUKD07qitZdfzlenSi8/0qQ==
   dependencies:
     "@eslint-community/eslint-utils" "^4.1.2"
-    "@eslint-community/regexpp" "^4.6.0"
+    "@eslint-community/regexpp" "^4.11.0"
     eslint-compat-utils "^0.5.1"
 
 eslint-plugin-n@^16.6.2: