Update people to reflect missing users from blog posts (#35178)

source/_data/people.yml

@@ -20,7 +20,7 @@ Madelena Mak:
 
 Guy Sie:
   name: Guy Sie
-  github: GuySie
+  github: guysie
 
 Gordon Cameron:
   name: Gordon Cameron
@@ -77,3 +77,11 @@ Zac West:
 Klaas Schoute:
   name: Klaas Schoute
   github: klaasnicolaas
+
+Joakim Sørensen:
+  name: Joakim Sørensen
+  github: ludeeus
+
+Andy Gill:
+  name: Andy Gill
+  github: ncandyg

source/_includes/post/author.html

@@ -8,7 +8,7 @@
 {% if author %}
   {% assign person = site.data.people[author] %}
   {% if person %}
-    <span class="byline author vcard"
+    <span class="byline author vcard">
       <a href="https://github.com/{{ person.github }}" target="_blank"><img class="author-avatar" src="https://avatars.githubusercontent.com/{{ person.github }}?size=64" alt="{{ person.name }}"/> {{ person.name }}</a>
     </span>
   {% else %}