docs: Fix a typo in security documentation.
docs: Fix a typo in security documentation.

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