Merge pull request #812 from gruntwork-io/enhancement/new-testimonial

Add testimonial from Markus

Author: ebeneliason

_data/testimonials.yml

@@ -1,3 +1,9 @@
+- name: "TSet"
+  logo: "logos-clients/logo-tset.png"
+  headshot: "headshot-markus-berger.jpg"
+  content: The quality that Gruntwork produces and maintains is outstanding. It has proven time and time again to be a huge accelerator bringing companies forward in terms of stability and quality. It also enables closer collaboration across the engineering organization by providing easy-to-use, battle-tested modules in a “plug-and-play” manner, enabling us to take care of the core business, generating more value across the board, and not being slowed down by unnecessary ‘grunt work.’
+  author: Markus Burger, DevOps Team Lead
+
 - name: "Solvvy"
   logo: "logos-clients/logo-solvvy.png"
   headshot: "headshot-venu-javarappa.jpg"