Release Notes: add a known issue pushing over the git:// protocol

Add a known issue to Release Notes as suggested in this comment:

git-for-windows/git#2824 (comment)

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

Git for Windows SDK 1.0.7

Test the post-install logging

Git for Windows SDK 1.0.6

Git for Windows SDK 1.0.5

Git for Windows SDK 1.0.3

This is purely a bug release to account for the fact that since Pacman's
version 5.0.1, we [have to reinitialize pacman's keyring manually
now](git-for-windows/git#670).

The third official release of the Git for Windows 2.x SDK

The main difference to version 1.0.1 is that it works around some memory
issues (tell-tale: fatal error in forked process - fork: can't reserve
memory for parent stack 0x600000 - 0x800000, (child has 0x400000 -
0x600000), Win32 error 487).

The Git for Windows SDK is gratefully based on MSYS2:

	http://msys2.github.io/.

The second official release of the Git for Windows 2.x SDK

The SDK can now be installed into locations whose paths contain spaces,
and the installation now works also if n NTLM proxy is required to
access the internet.

Our thanks go to MSys2: http://msys2.github.io/.

The first official Git SDK of Git for Windows 2.x

Based on MSys2: http://msys2.github.io/.

Git SDK 1.0.0 release candidate 3

The only change since release candidate 2 is that the git-doc-html
package is installed by default (to allow to run
/usr/src/build-extra/installer/release.sh as quickly as
/usr/src/build-extra is initialized).