[CHI-2025] Add sharing images for some speakers (#14866)

Author: mattstratton

content/events/2025-chicago/program/heather-thacker.md

@@ -5,6 +5,7 @@ Talk_end_time = ""
 Title = "DevOps and Baking"
 Type = "talk"
 Speakers = ["heather-thacker"]
+sharing_image = "heather-thacker.png"
 +++
 
 Drawing a comparison between my past and current professions. Looking at stages of baking in preparing, mixing, baking, and selling while comparing to DevOps stages of planning, building, deploying, and feedback. An analogy between the process of production baking and the philosophy of collaboration for shipping software.

content/events/2025-chicago/program/henrietta-dombrovskaya.md

@@ -5,6 +5,7 @@ Talk_end_time = ""
 Title = "Protecting your PostgreSQL data assets: one size does not fit all. Meet Security Framework!"
 Type = "talk"
 Speakers = ["henrietta-dombrovskaya"]
+sharing_image = "henrietta-dombrovskaya.png"
 +++
 
 

content/events/2025-chicago/speakers/heather-thacker.md

@@ -5,6 +5,6 @@ linkedin = "https://www.linkedin.com/in/hhthacker/"
 image = "heather-thacker.png"
 type = "speaker"
 linktitle = "heather-thacker"
-
+sharing_image = "heather-thacker.png"
 +++
 Developer advocate at Progress Chef with a background in software development and baking.

content/events/2025-chicago/speakers/henrietta-dombrovskaya.md

@@ -5,7 +5,7 @@ linkedin = "https://www.linkedin.com/in/henrietta-dombrovskaya-367b26/"
 image = "henrietta-dombrovskaya.png"
 type = "speaker"
 linktitle = "henrietta-dombrovskaya"
-
+sharing_image = "henrietta-dombrovskaya.png"
 +++
 Henrietta Dombrovskaya is a database researcher and practitioner with over 40 years of academic and industrial experience. She holds a Ph.D. in Computer Science from the University of Saint Petersburg, Russia. At present she is