Revert "Temporarily hold back from upgrading git-extra"

Now that the deployment worked, we can revert this commit.

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

Author: dscho

etc/pacman.conf

@@ -21,7 +21,7 @@ HoldPkg     = pacman
 Architecture = auto
 
 # Pacman won't upgrade packages listed in IgnorePkg and members of IgnoreGroup
-IgnorePkg   = mingw-w64-x86_64-git-extra
+# IgnorePkg   =
 #IgnoreGroup =
 
 #NoUpgrade   =