[GR-10390] Transition benchmark from X6-2 to X5-2 machine type.

Author: Stefan Anzinger

ci.jsonnet

@@ -79,7 +79,7 @@
   linuxMixin: linuxMixin,
 
   local linuxBenchMixin = linuxMixin + {
-    capabilities +: ["no_frequency_scaling", "tmpfs25g", "x62"],
+    capabilities +: ["no_frequency_scaling", "tmpfs25g", "x52"],
   },
   linuxBenchMixin: linuxBenchMixin,