Copyedit the 'finding support' section

Author: ckerr

docs/tutorial/support.md

@@ -3,22 +3,22 @@
 ## Finding Support
 
 If you have a security concern,
-please see the [security document](../../security.md).
-
-If you've found a bug in a [supported version](#supported-versions) of Electron,
-please report it with the [issue tracker](../development/issues.md).
+please see the [security document](../../SECURITY.md).
 
 If you need programming help,
 or want to join in the discussion with other Electron developers,
 or want to find sample starter applications,
 see [these community resources](../../README.md#community).
 
 If you'd like to contribute to Electron,
-see [contributing.md](../../CONTRIBUTING.md) document.
+see the [contributing document](../../CONTRIBUTING.md).
+
+If you've found a bug in a [supported version](#supported-versions) of Electron,
+please report it with the [issue tracker](../development/issues.md).
 
 ## Supported Versions
 
-The Electron maintainers support the latest three release branches.
+The latest three release branches are supported by the Electron team.
 For example, if the latest release is 2.0.x, then the 2-0-x series
 is supported, as are the two previous release series 1-7-x and 1-8-x.