Oleg Butuzov 2e9d9bc621 update broken links in docs (#3055) ...

* Removed text about source code

Source code was removed by hasura/graphql-engine@fb3794c3

* links update for subscriptions/index

links updated because
1) facebook.github.io was changed to graphql.github.io/graphql-spec/
2) path to docs changed by apollographql/apollo-client@41ca8ff1

2019-10-10 21:28:24 +05:30

..

manual

update broken links in docs (#3055)

2019-10-10 21:28:24 +05:30