Update package.json import paths for app files (#4101)

Author: jonrohan

.changeset/sour-pets-flash.md

@@ -0,0 +1,5 @@
+---
+"@primer/view-components": patch
+---
+
+Update package.json import paths for app files

package.json

@@ -18,8 +18,7 @@
     },
     "./app/*": {
       "types": "./app/*.d.ts",
-      "import": "./app/*.js",
-      "default": "./app/*.js"
+      "default": "./app/*"
     },
     "./*": "./*"
   },