doc/gitremote-helpers: fix more missing single-quotes
There are a few cases left in gitremote-helpers.txt that are missing a
closing quote, so you end up with:
'option deepen-since <timestamp>
with a stray opening quote instead of rendering correctly in italics.
These should have been part of
51d41dc243 (doc/gitremote-helpers: fix
missing single-quote, 2024-03-07), but apparently my eyesight is not
what it once was. Hopefully this is now all of them.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>