Update pipeline tag to feature-extraction

This PR updates the `pipeline_tag` from `fill-mask` to `feature-extraction`. The model's primary purpose and strength lie in its ability to perform feature extraction across multiple languages. The change to `feature-extraction` better reflects this core capability and improves searchability on the Hugging Face Hub.

README.md

@@ -1,6 +1,4 @@
 ---
-library_name: transformers
-license: apache-2.0
 language:
 - en
 - fr
@@ -17,7 +15,9 @@ language:
 - ar
 - tr
 - hi
-pipeline_tag: fill-mask
+library_name: transformers
+license: apache-2.0
+pipeline_tag: feature-extraction
 tags:
 - code
 ---