docs: Fix link to roles-and-permissions.
docs: Fix link to roles-and-permissions.

eeshangarg/zulip,andersk/zulip,punchagan/zulip,rht/zulip,eeshangarg/zulip,hackerkid/zulip,eeshangarg/zulip,kou/zulip,andersk/zulip,hackerkid/zulip,andersk/zulip,rht/zulip,punchagan/zulip,andersk/zulip,rht/zulip,andersk/zulip,zulip/zulip,zulip/zulip,andersk/zulip,hackerkid/zulip,zulip/zulip,punchagan/zulip,zulip/zulip,hackerkid/zulip,kou/zulip,hackerkid/zulip,punchagan/zulip,kou/zulip,rht/zulip,eeshangarg/zulip,zulip/zulip,rht/zulip,kou/zulip,hackerkid/zulip,hackerkid/zulip,eeshangarg/zulip,kou/zulip,punchagan/zulip,eeshangarg/zulip,kou/zulip,zulip/zulip,punchagan/zulip,eeshangarg/zulip,punchagan/zulip,zulip/zulip,rht/zulip,andersk/zulip,rht/zulip,kou/zulip