Fix talk ordering

source/_talks/upgrading-your-site-drupal-9.md

@@ -14,18 +14,18 @@ events:
   - name: DrupalNYC
     location: New York, USA
     url: https://ti.to/drupalnyc/meetup-2020-09-02
-    date: "2020-09-02"
+    date: 2020-09-02
     online: true
 
   - name: Leeds PHP
     location: Leeds, UK
     url: https://www.meetup.com/leedsphp/events/272504993
-    date: "2020-09-23"
+    date: 2020-09-23
     online: true
 
   - name: Midwest PHP
     url: https://midwestphp.org/talks/7C0m4I87vq72cDoXvsHFRp/Upgrading_your_site_to_Drupal_9
-    date: "2021-04-22"
+    date: 2021-04-22
     online: true
 ---