chore: update pin for testkube

Author: mcp-registry-bot

servers/testkube/server.yaml

@@ -24,7 +24,7 @@ about:
 source:
   project: https://github.com/kubeshop/testkube
   branch: main
-  commit: d45ec6b9c430f8446c7cbc5b2c65cc3d61a86d2c
+  commit: ec57e456a23006824f87c86856e8fec21c97f274
   dockerfile: build/mcp-server/Dockerfile
 config:
   description: Configure the connection to the Testkube Control Plane