[Glitch] Fix "Learn more" link target in column post privacy hint

Port ba773b9a8e20c83991ae48ffd8ca61b4617aef7b to glitch-soc

Signed-off-by: Claire <claire.github-309c@sitedethib.com>

app/javascript/flavours/glitch/features/direct_timeline/index.jsx

@@ -92,7 +92,7 @@ const DirectTimeline = ({ columnId, multiColumn }) => {
           scrollKey={`direct_timeline-${columnId}`}
           emptyMessage={<FormattedMessage id='empty_column.direct' defaultMessage="You don't have any private mentions yet. When you send or receive one, it will show up here." />}
           bindToDocument={!multiColumn}
-          prepend={<div className='follow_requests-unlocked_explanation'><span><FormattedMessage id='compose_form.encryption_warning' defaultMessage='Posts on Mastodon are not end-to-end encrypted. Do not share any dangerous information over Mastodon.' /> <a href='/terms' target='_blank'><FormattedMessage id='compose_form.direct_message_warning_learn_more' defaultMessage='Learn more' /></a></span></div>}
+          prepend={<div className='follow_requests-unlocked_explanation'><span><FormattedMessage id='compose_form.encryption_warning' defaultMessage='Posts on Mastodon are not end-to-end encrypted. Do not share any dangerous information over Mastodon.' /> <a href='https://docs.joinmastodon.org/user/posting/#private' rel='noreferrer' target='_blank'><FormattedMessage id='compose_form.direct_message_warning_learn_more' defaultMessage='Learn more' /></a></span></div>}
           alwaysPrepend
         />
       ) : (