doc: prefer 'stash push' over 'stash save'

[Phil Hord <phil.hord@gmail.com>]

Although `git stash save` was deprecated recently, some parts of the
documentation still refer to it instead of `push`.

Signed-off-by: Phil Hord <phil.hord@gmail.com>
---
 Documentation/git-stash.txt | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Documentation/git-stash.txt b/Documentation/git-stash.txt
index 8be661007..056dfb866 100644
--- a/Documentation/git-stash.txt
+++ b/Documentation/git-stash.txt
@@ -175,14 +175,14 @@ create::
  return its object name, without storing it anywhere in the ref
  namespace.
  This is intended to be useful for scripts.  It is probably not
- the command you want to use; see "save" above.
+ the command you want to use; see "push" above.

 store::

  Store a given stash created via 'git stash create' (which is a
  dangling merge commit) in the stash ref, updating the stash
  reflog.  This is intended to be useful for scripts.  It is
- probably not the command you want to use; see "save" above.
+ probably not the command you want to use; see "push" above.

 DISCUSSION
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-- 
2.15.0.471.g17a719cfe.dirty