Reword support a little bit to more clear and concise

Summary:
I tried to do this in #1556, but it landed before the change could be imported.
Closes https://github.com/facebook/rocksdb/pull/1557

Differential Revision: D4214572

Pulled By: siying

fbshipit-source-id: 718d4a4

docs/_top-level/support.md

@@ -11,11 +11,11 @@ Do not hesitate to ask questions if you are having trouble with RocksDB.
 
 ### GitHub issues
 
-The [GitHub issues](https://github.com/facebook/rocksdb/issues) page is a good place to report bugs, issues and feature requests for the RocksDB codebase.
+Use [GitHub issues](https://github.com/facebook/rocksdb/issues) to report bugs, issues and feature requests for the RocksDB codebase.
 
 ### Facebook Group
 
-Use the [RocksDB Facebook Group](https://www.facebook.com/groups/rocksdb.dev/) for general questions and discussion about RocksDB.
+Use the [RocksDB Facebook group](https://www.facebook.com/groups/rocksdb.dev/) for general questions and discussion about RocksDB.
 
 ### FAQ