Updated slack link, expired for some reason

Author: Xaoc000

data/SiteConfig.js

@@ -16,7 +16,7 @@ module.exports = {
     github: 'https://github.com/Eclipse-ioFog',
     twitter: 'https://twitter.com/eclipseiofog',
     slack:
-      'https://join.slack.com/t/iofog/shared_invite/enQtNTQxMDczNjE0Mjc5LWViMThlYTkxYzBhYzYzN2IxZDZjMGYyYjA0OTM2NDZlZTI0ZTUwOTdlYzllYWRlNDgwY2ExZjY3YWVhODM0MzU'
+      'https://join.slack.com/t/iofog/shared_invite/enQtNTQxMDczNjE0Mjc5LTRhMTE2YjgwNmRhOTg5ZmI3MGQ5OGM0N2E1MDg0OTJmMWYxZTgxZjE2MjA3NzY2MTFlZmEyYzc3OGQ5NmM4ZjI'
   },
   copyright: '© 2019 Eclipse Foundation, Inc.', // Copyright string for the footer of the website and RSS feed.
   themeColor: '#4668fd', // Used for setting manifest and progress theme colors.

src/components/Community/Community.jsx

@@ -61,13 +61,13 @@ class Community extends Component {
               <p>Come join our Slack to get updates and ask questions.</p>
               <div style={{ padding: '60px 0' }}>
                 <a
-                  href="https://join.slack.com/t/iofog/shared_invite/enQtNTQxMDczNjE0Mjc5LWViMThlYTkxYzBhYzYzN2IxZDZjMGYyYjA0OTM2NDZlZTI0ZTUwOTdlYzllYWRlNDgwY2ExZjY3YWVhODM0MzU"
+                  href="https://join.slack.com/t/iofog/shared_invite/enQtNTQxMDczNjE0Mjc5LTRhMTE2YjgwNmRhOTg5ZmI3MGQ5OGM0N2E1MDg0OTJmMWYxZTgxZjE2MjA3NzY2MTFlZmEyYzc3OGQ5NmM4ZjI"
                   className="discourse-button"
                 >
                   <img srcSet={slackLogo} alt="Eclipse" />
                 </a>
                 <a
-                  href="https://join.slack.com/t/iofog/shared_invite/enQtNTQxMDczNjE0Mjc5LWViMThlYTkxYzBhYzYzN2IxZDZjMGYyYjA0OTM2NDZlZTI0ZTUwOTdlYzllYWRlNDgwY2ExZjY3YWVhODM0MzU"
+                  href="https://join.slack.com/t/iofog/shared_invite/enQtNTQxMDczNjE0Mjc5LTRhMTE2YjgwNmRhOTg5ZmI3MGQ5OGM0N2E1MDg0OTJmMWYxZTgxZjE2MjA3NzY2MTFlZmEyYzc3OGQ5NmM4ZjI"
                   className="button"
                 >
                   Join Community Slack