Fix mismatch in prettier import order config (#1609)

Follow-up to #1608 — quick fix for an issue I encountered after merging
main into #1497

Just going to directly merge once this completes (cc @SuaYoo for
visibility)

frontend/prettier.config.js

@@ -10,15 +10,18 @@ module.exports = {
     "",
     "<THIRD_PARTY_MODULES>",
     "",
-    "^(\\./)(.*)",
+    // Parent directory items
+    "^\\.\\.$",
+    "^\\.\\.(/.+)$",
+    "",
+    // This directory items
+    "^\\.(/.+)$",
     "",
     "^\\.$",
     "",
     "^@/(.*)$",
     "^~assets/(.*)",
     "",
-    // "^\\./(.*)$",
-    // "",
   ],
   importOrderParserPlugins: ["typescript", "decorators-legacy"],
   importOrderTypeScriptVersion: "5.0.0",