Update section header in README.md from "What Our Clients Say" to "Testimonials" for improved clarity.

Author: klouddb-dev

README.md

@@ -19,7 +19,7 @@
 
 KloudDB Shield serves as a comprehensive security tool designed specifically for Postgres databases, conducting around 100 essential security checks. KloudDB Shield also offers the following additional features. Here is an example of an HTML report generated by our tool https://klouddb.io/klouddbshield_allchecks_aug12.html   :
 
-## 💬 What Our Clients Say
+## 💬 Product Feedback
 
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