chore: add module-sync entry

Author: JounQin

packages/eslint-mdx/package.json

@@ -22,6 +22,10 @@
         "types": "./lib/index.d.ts",
         "default": "./lib/index.js"
       },
+      "module-sync": {
+        "types": "./lib/index.d.ts",
+        "default": "./lib/index.js"
+      },
       "require": {
         "types": "./index.d.cts",
         "default": "./lib/index.cjs"

packages/eslint-plugin-mdx/package.json

@@ -22,6 +22,10 @@
         "types": "./lib/index.d.ts",
         "default": "./lib/index.js"
       },
+      "module-sync": {
+        "types": "./lib/index.d.ts",
+        "default": "./lib/index.js"
+      },
       "require": {
         "types": "./index.d.cts",
         "default": "./lib/index.cjs"