SCRIPTS: make announce-release executable again

I managed to mess up with the file's permission while using a temporary
one during last release, and to backport the non-exec version everywhere.
This can be backported as far as 1.7 now.

(cherry picked from commit 332ded5f3a74997c0ec2c0df8f19d643bb92b024)
Signed-off-by: Willy Tarreau <w@1wt.eu>
(cherry picked from commit aea04c61b3129f251dc73d72bd04febf5185e199)
Signed-off-by: Willy Tarreau <w@1wt.eu>
1 file changed