Add a comment on the order of returned values

scripts/core/kernel.yml

@@ -126,7 +126,11 @@ etors:
     - name: NUM_REGS
       desc: "[uint32_t][optional-query] Return the number of registers used by the compiled kernel."
     - name: SPILL_MEM_SIZE
-      desc: "[uint32_t[]][optional-query] Return the spill memory size allocated by the compiler."
+      desc: | 
+            [uint32_t[]][optional-query] Return the spill memory size allocated by the compiler.
+            The returned values correspond to the associated devices.
+            The order of the devices is guaranteed (i.e., the same as queried by `urDeviceGet`)
+            by the UR within a single application even if the runtime is reinitialized.
 --- #--------------------------------------------------------------------------
 type: enum
 desc: "Get Kernel Work Group information"