docs: Update GSoC ideas page (sans project ideas).
docs: Update GSoC ideas page (sans project ideas).

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