Update lm-eval-tutorial.adoc (#58)

wrong spec validation:

https://github.com/trustyai-explainability/trustyai-service-operator/blob/b2f471ddbd45165b57310c4fe1b9bf563ee3bdf6/api/lmes/v1alpha1/lmevaljob_types.go#L513

Author: tarilabs

docs/modules/ROOT/pages/lm-eval-tutorial.adoc

@@ -709,7 +709,7 @@ spec:
     taskNames:
       - mmlu
   logSamples: true
-  batchSize: 1
+  batchSize: '1'
   modelArgs:
     - name: model
       value: granite