fix typo

Author: Feiyang1

scripts/exp/prepare-firestore-for-exp-release.ts

@@ -38,7 +38,7 @@ export async function prepare() {
 
   packageJson.peerDependencies = {
     '@firebase/app-exp': '0.x',
-    '@firebase/app-exp-types': '0.x'
+    '@firebase/app-types-exp': '0.x'
   };
 
   packageJson.main = expPackageJson.main.replace('../', '');