Mention New Feature in release notes

The type of symlinks to create (directory
or file) [can now be specified via the
`.gitattributes`](git-for-windows/git#1897).

Signed-off-by: Johannes Schindelin <[email protected]>

Author: dscho

ReleaseNotes.md

@@ -41,6 +41,7 @@ This package contains software from a number of other projects including Bash, z
 * Comes with [OpenSSH v7.9p1](https://www.openssh.com/txt/release-7.9).
 * The description of the editor option to choose Vim [has been clarified](https://github.com/git-for-windows/build-extra/pull/207) to state that this *unsets* `core.editor`.
 * Comes with [cURL v7.62.0](https://curl.haxx.se/changes.html#7_62_0).
+* The type of symlinks to create (directory or file) [can now be specified via the `.gitattributes`](https://github.com/git-for-windows/git/pull/1897).
 
 ## Changes since Git for Windows v2.19.0 (September 11th 2018)