api docs: Fix whitespace in changelog articles.
api docs: Fix whitespace in changelog articles.

timabbott/zulip,hackerkid/zulip,showell/zulip,timabbott/zulip,rht/zulip,rht/zulip,punchagan/zulip,eeshangarg/zulip,hackerkid/zulip,rht/zulip,shubhamdhama/zulip,zulip/zulip,eeshangarg/zulip,showell/zulip,showell/zulip,shubhamdhama/zulip,synicalsyntax/zulip,rht/zulip,showell/zulip,shubhamdhama/zulip,brainwane/zulip,brainwane/zulip,eeshangarg/zulip,kou/zulip,punchagan/zulip,brainwane/zulip,andersk/zulip,timabbott/zulip,synicalsyntax/zulip,shubhamdhama/zulip,brainwane/zulip,rht/zulip,timabbott/zulip,zulip/zulip,brainwane/zulip,hackerkid/zulip,zulip/zulip,andersk/zulip,kou/zulip,synicalsyntax/zulip,timabbott/zulip,kou/zulip,punchagan/zulip,hackerkid/zulip,kou/zulip,hackerkid/zulip,hackerkid/zulip,hackerkid/zulip,showell/zulip,punchagan/zulip,kou/zulip,brainwane/zulip,zulip/zulip,eeshangarg/zulip,synicalsyntax/zulip,zulip/zulip,eeshangarg/zulip,synicalsyntax/zulip,showell/zulip,eeshangarg/zulip,rht/zulip,shubhamdhama/zulip,brainwane/zulip,punchagan/zulip,shubhamdhama/zulip,andersk/zulip,andersk/zulip,zulip/zulip,timabbott/zulip,synicalsyntax/zulip,showell/zulip,andersk/zulip,rht/zulip,kou/zulip,punchagan/zulip,punchagan/zulip,shubhamdhama/zulip,andersk/zulip,timabbott/zulip,zulip/zulip,andersk/zulip,kou/zulip,synicalsyntax/zulip,eeshangarg/zulip