minor cleanup of index.html
minor cleanup of index.html

kubernetes/perf-tests,sjug/perf-tests,sjug/perf-tests,kubernetes/perf-tests,sjug/perf-tests,shyamjvs/perf-tests,shyamjvs/perf-tests,shyamjvs/perf-tests,shyamjvs/perf-tests,shyamjvs/perf-tests,kubernetes/perf-tests,sjug/perf-tests,kubernetes/perf-tests,kubernetes/perf-tests,sjug/perf-tests