Add org to config options (#13697)

Source map upload configuration is missing organisation slug, added it.

Author: rodolfoBee

docs/platforms/javascript/guides/astro/index.mdx

@@ -80,6 +80,7 @@ export default defineConfig({
     sentry({
       sourceMapsUploadOptions: {
         project: "___PROJECT_SLUG___",
+        org: "___ORG_SLUG___",
         authToken: process.env.SENTRY_AUTH_TOKEN,
       },
     }),