Moved members-stripe-service -> stripe

no-issue

We are already in the Members repository so there's no need for members
in the directory name. The NPM package name however is unchanged and
still requires specificity as it is scoped to @tryghost as a whole
rather than the Members feature.

ghost/stripe/package.json

@@ -1,7 +1,7 @@
 {
   "name": "@tryghost/members-stripe-service",
   "version": "0.5.2",
-  "repository": "https://github.com/TryGhost/Members/tree/main/packages/members-stripe-service",
+  "repository": "https://github.com/TryGhost/Members/tree/main/packages/stripe",
   "author": "Ghost Foundation",
   "license": "MIT",
   "main": "index.js",