Fix bio photos

Author: agentlecisco

_data/authors.yml

@@ -37,14 +37,14 @@ diana_lakatos:
 
 margaret_eker:
   name: Margaret Eker
-  avatar: https://docslikecode.com/images/margaret_eker.jpg
+  avatar: https://docslikecode.com/images/margaret-eker.jpg
   github: //github.com/meker12
   twitter:
   bio: "Senior Technical Writer"
 
 tom_johnson:
   name: Tom Johnson
-  avatar: https://docslikecode.com/images/tom_johnson.jpg
+  avatar: https://docslikecode.com/images/tom-johnson.jpg
   github: //github.com/tomjoht
   twitter: http://twitter.com/tomjohnson
   bio: "Technical Writer"