Push timestamp in the past

So these pages don't appear as recent on the RSS feed

content/about.md

@@ -4,7 +4,7 @@ omit_header_text: true
 featured_image: "images/BioIT_logo_about.png"
 description:
 type: page
-date: 2020-09-07T17:40:00+01:00
+date: 2019-09-07T17:40:00+01:00
 menu:
   main: {}
 ---

content/contact.md

@@ -4,7 +4,7 @@ omit_header_text: true
 featured_image: "images/71CjSSB83Wo_ptikutam_unsplash.jpeg"
 description:
 type: page
-date: 2020-09-07T18:20:00+01:00
+date: 2019-09-07T18:20:00+01:00
 ---
 
 This project is led by Renato Alves (previously led by [Malvika Sharan](https://twitter.com/malvikasharan)) as a part of EMBL Bio-IT. Please [contact us](mailto:bio-it@embl.de) for any query, suggestion, contribution and more information about this project.