lint: Fix tab-based whitespace in uploaded_files_list.hbs.
lint: Fix tab-based whitespace in uploaded_files_list.hbs.

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