Add a release note (feature)

Comes with [Tig
v2.5.11](https://github.com/jonas/tig/releases/tag/tig-2.5.11).

Signed-off-by: gitforwindowshelper[bot] <[email protected]>

Author: gitforwindowshelper[bot]

ReleaseNotes.md

@@ -47,6 +47,7 @@ Git for Windows is distributed with other components yet, such as Bash, zlib, cu
 * Comes with [MinTTY v3.7.7](https://github.com/mintty/mintty/releases/tag/3.7.7).
 * New Git for Windows installation [now default to the Windows-native HTTPS transport backend](https://github.com/git-for-windows/build-extra/pull/586).
 * Comes with the MSYS2 runtime (Git for Windows flavor) based on [Cygwin v3.5.7](https://inbox.sourceware.org/cygwin-announce/[email protected]/T/#u) (Git for Windows skipped [v3.5.5](https://inbox.sourceware.org/cygwin-announce/[email protected]) because it failed to pass Git's test suite, and [Cygwin v3.5.6](https://inbox.sourceware.org/cygwin-announce/[email protected]/) was superseded too quickly).
+* Comes with [Tig v2.5.11](https://github.com/jonas/tig/releases/tag/tig-2.5.11).
 
 ### Bug Fixes