Add text-generation task category

Added the `text-generation` task category to the dataset card metadata.

README.md

@@ -21,14 +21,17 @@ dataset_info:
   splits:
   - name: test
     num_examples: 5102
-programming_languages: [java]
+programming_languages:
+- java
 tags:
-  - coding
-  - code-migration
-  - java
-  - amazon
-  - amazon-science
-  - aws
+- coding
+- code-migration
+- java
+- amazon
+- amazon-science
+- aws
+task_categories:
+- text-generation
 ---
 
 # MigrationBench
@@ -136,4 +139,4 @@ Here is a sample `maven -f test .` command output to get valid `num_test_cases`:
       primaryClass={cs.SE},
       url={https://arxiv.org/abs/2505.09569},
 }
-```
+```