Update types path in package.json for debug (#807)

Author: JoviDeCroock

.changeset/quiet-toys-count.md

@@ -0,0 +1,5 @@
+---
+"@preact/signals-debug": patch
+---
+
+Update types in the export map of our package.json

packages/debug/package.json

@@ -23,7 +23,7 @@
   "source": "src/index.ts",
   "exports": {
     ".": {
-      "types": "./dist/debug.d.ts",
+      "types": "./dist/signals-debug.d.ts",
       "browser": "./dist/debug.module.js",
       "import": "./dist/debug.mjs",
       "require": "./dist/debug.js"