fix the link showing "Trials.md"

docs/en_US/Tutorial/AnnotationSpec.md

@@ -84,10 +84,10 @@ h_pooling = max_pool(hidden_layer, pool_size)
 
    `'''@nni.report_intermediate_result(metrics)'''`
 
-`@nni.report_intermediate_result` is used to report intermediate result, whose usage is the same as `nni.report_intermediate_result` in [Trials.md](../TrialExample/Trials.md)
+`@nni.report_intermediate_result` is used to report intermediate result, whose usage is the same as `nni.report_intermediate_result` in the doc of [Write a trial run on NNI](../TrialExample/Trials.md)
 
 ### 4. Annotate final result
 
    `'''@nni.report_final_result(metrics)'''`
 
-`@nni.report_final_result` is used to report the final result of the current trial, whose usage is the same as `nni.report_final_result` in [Trials.md](../TrialExample/Trials.md)
+`@nni.report_final_result` is used to report the final result of the current trial, whose usage is the same as `nni.report_final_result` in the doc of [Write a trial run on NNI](../TrialExample/Trials.md)

tools/nni_annotation/README.md

@@ -83,10 +83,10 @@ h_pooling = max_pool(hidden_layer, pool_size)
 
    `'''@nni.report_intermediate_result(metrics)'''`
 
-`@nni.report_intermediate_result` is used to report intermediate result, whose usage is the same as `nni.report_intermediate_result` in [Trials.md](https://nni.readthedocs.io/en/latest/TrialExample/Trials.html)
+`@nni.report_intermediate_result` is used to report intermediate result, whose usage is the same as `nni.report_intermediate_result` in the doc of [Write a trial run on NNI](https://nni.readthedocs.io/en/latest/TrialExample/Trials.html)
 
 ### 4. Annotate final result
 
    `'''@nni.report_final_result(metrics)'''`
 
-`@nni.report_final_result` is used to report the final result of the current trial, whose usage is the same as `nni.report_final_result` in [Trials.md](https://nni.readthedocs.io/en/latest/TrialExample/Trials.html)
+`@nni.report_final_result` is used to report the final result of the current trial, whose usage is the same as `nni.report_final_result` in the doc of [Write a trial run on NNI](https://nni.readthedocs.io/en/latest/TrialExample/Trials.html)