Fix broken author photo liniks

Author: dlebauer

blog/authors.yml

@@ -2,15 +2,15 @@ david_lebauer:
   name: David LeBauer
   url: https://davidlebauer.com
   title: PEcAn Project co-PI
-  image_url: https://datascience.cct.arizona.edu/sites/datascience.cct.arizona.edu/files/styles/az_medium/public/2023-11/david_lebauer.jpeg
+  image_url: https://datascience.cct.arizona.edu/sites/datascience.cct.arizona.edu/files/styles/az_medium/public/2023-11/david_lebauer.jpeg.webp
   socials:
     github: dlebauer
     linkedin: dlebauer
 
 rohan_sasne:
   name: Rohan Sasne
   title: GSoC'23 participant @PEcAn Project
-  image_url: "https://media.licdn.com/dms/image/D4D03AQHY70hvxDx1wg/profile-displayphoto-shrink_400_400/0/1718313426682?e=1725494400&v=beta&t=T3SkIPDWUUDAPsjCIuGy07C63BQbaCovWUEHCuzkUbk"
+  image_url: "https://ca.slack-edge.com/T4QC4TLNP-U04RMA1RHN1-ecb6a1c8d07f-192"
   socials:
     linkedin: rohan-sasne