Add image-to-image task category

This PR adds the `image-to-image` task category to the dataset metadata. Since the project involves predicting spatial radiomaps from environment and configuration features (often using architectures like UNet or GANs), this category accurately reflects the nature of the data and helps users find it when filtering the Hugging Face Hub by task.

README.md

@@ -1,18 +1,20 @@
 ---
+language:
+- en
 license: cc-by-4.0
+size_categories:
+- 10K<n<100K
+task_categories:
+- image-to-image
 pretty_name: Multi-config Radiomap Dataset and Pretrained Models for U6G XL-MIMO
 tags:
-  - wireless
-  - radiomap
-  - xl-mimo
-  - u6g
-  - beamforming
-  - benchmark
-  - signal-processing
-size_categories:
-  - 10K<n<100K
-language:
-  - en
+- wireless
+- radiomap
+- xl-mimo
+- u6g
+- beamforming
+- benchmark
+- signal-processing
 ---
 
 # Multi-config Radiomap Dataset and Pretrained Models for U6G XL-MIMO
@@ -114,6 +116,4 @@ Formal citation information will be updated after the paper metadata is finalize
 
 **Xiaojie Li**
 [xiaojieli@seu.edu.cn](mailto:xiaojieli@seu.edu.cn)
-[xiaojieli@nuaa.edu.cn](mailto:xiaojieli@nuaa.edu.cn)
-
-
+[xiaojieli@nuaa.edu.cn](mailto:xiaojieli@nuaa.edu.cn)