Add testimonial MIRAKL (#330)

* Add testimonial MIRAKL

Signed-off-by: Floor Drees <floordrees@gmail.com>

Author: FloorD

content/end_users/logo/mirakl.png

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+---
+title: MIRAKL
+image: logo/mirakl.png
+homepage: https://www.mirakl.com/
+weight: 30
+---
+
+> _MIRAKL has been using CloudNativePG in production since February 2024 to support our marketplace operation workload (450 Pg clusters, 31 TB of data, 3650 CPUs & 20 TB of RAM-between 2 & 64 CPU per cluster) and it's so much better than our previous stack using cloud virtual machines provisioned with Ansible & Terraform code. We're really excited about all the improvements we have discovered in the releases that we have seen since, and the future of the project!_ 
+\
+— Thomas Boussekey, Senior PostgreSQ DBA at MIRAKL