Update spec.md

Co-authored-by: Saad Ali <[email protected]>

Author: sunnylovestiramisu

Diff for: spec.md

@@ -1671,8 +1671,8 @@ message ControllerModifyVolumeRequest {
   // section on how to use this field.
   map<string, string> secrets = 2 [(csi_secret) = true];
 
-  // Plugin specific parameters to apply, passed in as opaque key-value
-  // pairs. This field is REQUIRED. The Plugin is responsible for
+  // Plugin specific volume attributes to mutate, passed in as opaque key-value pairs. 
+  // This field is REQUIRED. The Plugin is responsible for
   // parsing and validating these parameters. COs will treat these
   // as opaque. The CO SHOULD specify the intended values of all mutable
   // parameters it intends to modify. SPs MUST NOT modify volumes based