Update index.html

Adds superscript for webchat links to save space.
2 jobs for master in 1 minute and 14 seconds (queued for 2 seconds)
Name Stage Failure
test Test Site There is an unknown failure, please try again
/usr/lib/ruby/vendor_ruby/jekyll/drops/drop.rb:8: warning: previous definition of NON_CONTENT_METHODS was here
Configuration file: /builds/linux.community/linux-community-site/_config.yml
Source: /builds/linux.community/linux-community-site
Destination: build/
Incremental build: disabled. Enable with --incremental
Liquid Exception: Liquid syntax error (line 53): Unknown tag 'Webchat' in index.html
jekyll 3.1.6 | Error: Liquid syntax error (line 53): Unknown tag 'Webchat'
ERROR: Build failed: exit code 1