Added photo and short bio for adamsc64

Author: adamsc64

src/_content/presenters/christopher-adams.jpeg

@@ -3,12 +3,14 @@ company: GitHub
 hidden: false
 name: Christopher Adams
 permalink: /presenters/christopher-adams/
-photo: ''
+photo: christopher-adams.jpeg
 social:
     bluesky: null
-    github: null
-    instagram: null
+    github: adamsc64
+    instagram: adamsc64
     mastodon: null
     twitter: adamsc64
     website: http://christopheradams.info
 ---
+
+Previously Technical Lead at Venmo, Christopher Adams is now in engineering at GitHub on the Developer Frameworks Team in Developer Experience (DX).