Revert mx update in ci/graal/common.jsonnet

Author: Ariouz

ci/graal/ci/common.jsonnet

@@ -286,6 +286,18 @@ local common_json = import "../common.json";
       } else {},
     },
 
+    truffleruby:: {
+      packages+: (if self.os == "linux" && self.arch == "amd64" then {
+        ruby: "==3.2.2", # Newer version, also used for benchmarking
+      } else if (self.os == "windows") then
+        error('truffleruby is not supported on windows')
+      else {
+        ruby: "==3.0.2",
+      }) + (if self.os == "linux" then {
+        libyaml: "==0.2.5",
+      } else {}),
+    },
+
     graalnodejs:: {
       local this = self,
       packages+: if self.os == "linux" then {
@@ -559,4 +571,4 @@ local common_json = import "../common.json";
 
   windows_amd64: self.bare.windows_amd64 + common,
   windows_server_2016_amd64: self.bare.windows_server_2016_amd64 + common,
-}
+}