Add links + fix file name

README.md

@@ -3,12 +3,12 @@ e-mission phone app
 
 This is the phone component of the e-mission system.
 
-:sparkles: This has now been upgraded to cordova [email protected] and [email protected] (details). It also now supports CI, so we should not have any build issues.
+:sparkles: This has now been upgraded to cordova [email protected] and [email protected] ([details](https://github.com/e-mission/e-mission-docs/issues/519)). It also now supports CI, so we should not have any build issues in the future.
 
 The current limitations are:
 - [trip end notifications have some minor issues](https://github.com/e-mission/e-mission-transition-notify/issues/25): I will handle this as part of the upcoming upgrade to even newer cordova versions
 - [OpenID auth code has not been tested](https://github.com/e-mission/e-mission-docs/issues/519): It would be great if somebody who is using OpenIDAuth is able to report on testing results
-- [Push notifications on iOS require setting `IS_GCM_ENABLED` to `<false>` in `GoogleServices.json`](https://github.com/e-mission/e-mission-docs/issues/437#issuecomment-513506146)
+- [Push notifications on iOS require setting `IS_GCM_ENABLED` to `<false>` in `GoogleServices.plist`](https://github.com/e-mission/e-mission-docs/issues/437#issuecomment-513506146)
 
 :construction: There are now newer versions of cordova available. Since I am making these changes anyway, I plan to spend a day or two finishing the upgrade to [email protected] (released 29 Jun 2020) and [email protected] (released 23 Jun 2020). Hopefully, that will keep us going for a while longer without needing maintenance updates.